NSW Treasury's new realism: productivity won't be speeding up

Have you noticed how people keep banging on about “productivity” these days? That’s because it’s the secret sauce of economics, the bit that comes closest to giving us a free lunch. But also because we haven’t actually been getting much of it lately.

Unfortunately, that’s made productivity a happy hunting ground for bulldust propositions. So let’s spell out exactly what productivity is.

A business – or a whole economy – improves its productivity when it finds ways to produce more outputs of goods and services with the same inputs of raw materials, labour and physical capital.

Sounds a great idea, but how is it possible? Short answer: advances in technology. Workers become more productive when they’re given tools and machines to work with. Many improvements in technology are designed to make workers more productive.

Better education and training make workers more productive by increasing their “human capital”. Even finding better ways to organise factories and offices can improve productivity. So can be teaching bosses better ways to jolly along their troops.

In my writing about the topic, I always focus on the simplest and least inaccurate way of measuring productivity. The productivity of labour is just output per worker or, better, output per hour worked.

Another approach would be to measure the productivity of the other main “factor of production”, capital equipment and constructions: output per unit of capital employed.

But economists often prefer to focus on “total-factor productivity” (or “multifactor productivity” as the statisticians prefer to call it): the growth in output (gross domestic product) that can’t be explained by increased use of labour and capital.

Economists have discovered that most of the improvement in people’s material standard of living over the years and centuries has come from improvement in total-factor productivity. This is why economists seem so obsessed by it. Keep productivity improving and we get wealthier.

But, as you see, total-factor productivity can’t be measured directly. It’s measured as a residual – what’s left when you take GDP and subtract two different things – which increases the chance your measurement is wrong.

And the truth is, economists don’t know as much about what causes productivity improvement as they ought to. That’s why they’ve spent the past decade debating the reasons that productivity growth has slowed significantly in all the advanced economies, not just Australia.

Theories abound, but there’s no agreement. And while we’re hearing plenty of tub-thumping sermons from business people (and central bankers) with their own axes to grind, there’s no agreement on what we should be doing apart from blaming the government and demanding it do something.

But last year, Professor Thomas Philippon of New York University wrote a working paper that offered a quite different explanation for the weak productivity growth we’ve been experiencing.

Conventional economic theory assumes that total-factor productivity grows “exponentially”, but Philippon has examined America’s productivity figures since 1947 – and done the same for a large group of other advanced economies – and found the growth has merely been “linear”.

Huh? Try this. If you have $100 growing 2 per cent each year, that’s exponential. If instead it just grows by $2 a year, that’s linear. Exponential growth is a fixed percentage rate; linear growth is a fixed absolute amount. The first $2 is 2 per cent of $100, but over the years the percentage rate of growth slowly declines.

So Philippon is saying we’ve been expecting productivity to grow at a much faster percentage rate than we should have been. Because its growth is “additive” rather than “multiplicative”, its annual percentage growth is declining.

The assumption that productivity improvement is exponential implies that innovation today makes further discoveries easier in the future. Philippon, however, finds that new ideas add to our stock of knowledge, but they don’t multiply it.

In the NSW Treasury’s new research paper, Trends in productivity: What should we expect, Keaton Jenner and Angus Wheeler have replicated Philippon’s exercise for Australia, getting similar results.

Whereas the standard exponential model implies that total-factor productivity should have grown at the annual rate of 1.7 per cent between 1983 and 2019, they find this significantly overshoots actual productivity growth.

But the new, additive model implies that productivity increases by 0.024 points per year, with an annual growth rate that tapers down from 1.25 per cent in 1984 to 0.9 per cent in 2019.

So, Philippon’s additive model yields what would have been a much more accurate – though still slightly optimistic – forecast.

This suggests that, without some major new “general-purpose” technological advance (such as the spread of electricity, or the internal-combustion engine), the model predicts that total-factor productivity growth will slowly fall to zero per cent.

But this doesn’t mean living standards wouldn’t continue to improve. Because living standards are powered by the productivity of labour, the authors find, they would grow by increasingly larger absolute amounts, but not at a steady, exponential rate of growth.

In the NSW government’s intergenerational report in 2021, productivity projections were based on the historical 30-year average exponential rate of 1.2 per cent a year. Other assumptions meant that real gross state product was projected to grow at an average rate of 2.2 per cent a year out to 2041.

The authors repeat this exercise using an additive productivity model and find that annual growth in labour productivity declines from 1 per cent to 0.8 per cent over the 20 years to 2041. This means an average annual rate of growth in real gross state product of 1.9 per cent – 0.3 percentage points lower that projected in the 2021 report.

The authors point out that, if realised, the NSW economy would be about 7 percentage points smaller in 2041 than was projected in the report two years’ ago. This, in turn, would have “material implications” for the government’s revenue base and budget balance, assuming no offsetting reduction in government spending.

It will be interesting to see if Victoria and the other state governments recalibrate their projections using this new, more pessimistic – but more realistic – view of the future.

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The knowledge economy is behind the soaring price of land

Over the two centuries and more that people have made a serious study of how the economy works, economists have fallen in and out of love with land. At first, they thought it was at the centre of everything, then they decided it wasn’t terribly important. But the wheel may be turning again. In a major speech last month, the Grattan Institute’s Brendan Coates criticised his profession for its “longstanding intellectual neglect of the economics of land”.

You don’t have to think about housing affordability for long to realise it is not actually the high cost of building a house that’s the problem, it’s the high cost of the land it’s built on.

But why is the cost of land rising much faster than the economy is growing? And why don’t economists take more interest in why this is happening and what we could do about it?

Coates began the annual Henry George Lecture by summarising the history of economists’ waxing and waning interest in land as a resource used to produce goods and services.

The first economists – the Physiocrats – thought of almost nothing other than land, he says. Land was fundamental: agricultural labourers were the source of economic growth, while landlords simply commandeered what the workers produced and flowed it through to the rest of the economy.

The next generation of economists, the “classical” economists of the 18th century, broadened their focus to studying the complex interaction of three “factors of production”: land, labour and (physical) capital.

Adam Smith, a Scotsman known as the father of economics, argued that the “division of labour” – workers specialising in different occupations – and technological innovation were what drove economic growth. But land was still central.

David Ricardo, an English member of parliament, argued that landlords were simply the lucky beneficiaries of land’s natural scarcity (any country has only a fixed amount of it) and its productive capacity, to produce food and fibre and even valuable energy and minerals, Coates says.

And Henry George, the last great classical economist, argued that the rental income enjoyed by landlords must be socialised by taxing the unimproved value of all privately owned land.

Do that, and you wouldn’t need any other taxes. George campaigned hard, but never persuaded any government to follow his advice.

Coates says we “would have done well – possibly much better than we have done – if we’d heeded the lessons of Henry George and paid more attention to the economics of land”.

But in the 19th century the classical economists were replaced by the neo-classical economists, who were a lot less interested in land. And in 1956, the great American economist Robert Solow developed a theory of economic growth, which held that it was improvements in the efficiency with which labour and physical capital (machines and buildings) were combined that drove our standard of living.

The role of land in production - and in inequality - disappeared from the theories economists devised to explain the world, Coates says. Instead, land was treated as just another form of physical capital.

Coates says that “the shifting focus on land in the history of economic thought reflects the changing nature of the economies that economists were trying to explain”.

The Physiocrats observed a world dominated by agriculture. It was obvious that the ownership and use of land determined what got produced, in what quantities. And who got what.

The classical economists watched this world transition through the Industrial Revolution, and the neo-classical economists developed theories for a world that had made that transition.

Economic power started to gravitate towards those who owned capital (whether physical or financial) and away from those who owned land. Agricultural production made way for industrial production.

For most of the 20th century, the neglect of land was of little consequence. More important was the amount of capital invested (to make labour more productive) and the pace of innovation (ditto).

“But as the advanced economies of the world have transitioned again – from manufacturing to services – land is back,” Coates says. Economies powered by intangible capital – how much you know; how much information you can gather – strive or stagnate on the ability of individuals to come together and combine their knowledge and skills.

As any real estate agent will tell you, it’s about “location, location, location”. In Australia, it’s the Grattan Institute that’s done most to help us see that, these days, it’s big cities that drive the economy.

Eighty per cent of the value of all goods and services produced in Australia is generated on just 0.2 per cent of our land. Economic activity is concentrated in CBDs, with the Sydney and Melbourne CBDs accounting for 10 per cent of all economic activity in Australia – more than three times the contribution of agriculture.

This concentration reflects the rise in knowledge-intensive services, clustered together at the hearts of our major cities. The willingness of businesses to pay high rents to locate in the CBDs of our big cities shows the value they gain from access to high-skilled workers and proximity to suppliers, customers and partners.

Similarly, the willingness of workers to pay much higher prices for homes located close to those employment centres shows they, too, see value in being crammed in. Our experience of working from home during the pandemic has changed this a bit – three days in the office rather than five – but not a lot.

All this helps explain why house prices have risen about five times faster than average full-time earnings over the past 25 years. And it means the price of land is a much bigger factor in the economy than it used to be.

It’s leaving existing home owners seemingly much better off, but aspiring home owners much worse off. It’s the product of a clash between the rise of the knowledge economy and our longstanding attitudes towards the taxing and regulation of land.

It should not be beyond the wit of economists to come up with a better approach.

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Morrison moves the deck chairs on the hulk of our universities

A new rule of politics seems to be that no matter how badly the pollies have stuffed up some area of government responsibility, they can always make it worse. Enter the hapless federal Education Minister Dan Tehan who, doubtless acting under instructions from the boss, has just announced another set of passive-aggressive changes to university funding.

If, like a good Quiet Australian, you haven't been paying close attention, you may have gained the impression that the government is acting to help our unis to take in more local students – helping fill the vacuum left by the disappearance of overseas students – and changing the structure of tuition fees to encourage students into more occupationally oriented courses, which will make them "job-ready graduates" going into fields where the need for graduates is expected to be greatest.

You probably haven't noticed that, according to Tehan, the package includes "an additional $400 million over four years" for regional unis, and "a further $900 million" for the National Priorities and Industry Linkage Fund.

Except that the whole package is "budget neutral" – a bureaucrat's way of saying it will cost the government not an extra cent. Since the government's expecting extra demand for uni places over the next three years, this is tantamount to its first major cost-cutting exercise after taking fright at the blowout in the budget deficit caused by the lockdown of the economy. So the "extra" and "further" funding will be coming not from the government's pockets but those of the universities and their students.

The government will fund an extra 39,000 places by 2023 – an increase of about 6 per cent – as the recession prompts more school leavers to stay on in education (and avoid taking a gap year), but will compensate for this by cutting the amount of its funding per student.

According to calculations by Professor David Peetz, of Griffith University (whose former job as a senior federal bureaucrat helps him find where the bodies are buried), the government will cut its funding by an annual $1883 per student, with the average increase in tuition fees of $675 per student reducing the net loss to universities to $1208 per student. (The fee changes won't apply to existing students, however.)

That is, the unis are being asked to do more with less. It's a safe bet their main response will be to further increase their ratio of students to staff. Unis will become even more of a sausage factory – which will be really great for the nation's investment in "human capital".

My guess is that the changes to the structure of tuition fees – with a hodgepodge of big cuts, small cuts, small increases, big increases and no changes – are intended to give the appearance of doing something to increase employment, to gratify the parliamentary Liberal Party's antipathy towards the universities (hotbeds of leftie activists who think Black Lives Matter and have kids who wag school because the silly-billies are worried about climate change) and to divert attention from the way the unis have been short-changed.

With the fee for humanities degrees up by a mere 113 per cent, it's quite a diversion. I'll be diverted only to the extent of quoting from a speech by a Business Council official in 2016: business needed the skills of "critical thinking, synthesis, judgment and an understanding of ethical constructs". The humanities produced people who can "ask the right questions, think for themselves, explain what they think, and turn those ideas into actions".

Ah, maybe that's what the backbench doesn't fancy.

Professor Andrew Norton, of the Australian National University, a recognised expert, doubts that the fee changes will do much to change students' preferences away from courses they think they'd like. And Peetz points out that it's the unis, not the government, that will be bearing the cost of the fee reductions for those courses the government prefers.

Which brings us to Professor Ian Jacobs, boss of UNSW, who points to the perverse incentives the changes will create (assuming the Senate is mad enough to pass them). Unis will be tempted to offer most places in those courses with the widest gap between the high government-set tuition fee and the cost of running the course. They'll be pushing BAs harder than ever.

This, of course, is exactly the way you'd expect the vice-chancellors to behave when you've taken government-owned and regulated agencies, spent 30 years pursuing a bipartisan policy of cutting their federal funding (from 86 per cent to 28 per cent of total receipts, in the case of Sydney University) and pretending they've been privatised.

Then, after they've turned to getting about a quarter of their funding from overseas students, but the coronavirus obliges you to ban foreign travellers, you hang them out to dry, refusing them access to the JobKeeper wage subsidy scheme because they should never have allowed themselves to become so dependent on a single source of revenue.

For a while I thought the crisis had got Scott Morrison governing for all Australians. It hasn't taken him long to revert to playing friends and enemies.

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It's weak investment that’s crimping productivity and prospects

US President Donald Trump said his big cut in company tax would do wonders for the economy. It’s certainly done wonders for company share buybacks. Which may be a clue to why America’s rate of improvement in productivity is so pathetic.

The continuing puzzle for the rich world’s economists is explaining the unusually weak rate of productivity improvement throughout the advanced economies. In Oz we’re not doing so badly, though we used to do a lot better.

Productivity measures the quantity of the economy’s (or just a particular business’s) output of goods and services relative to its inputs of raw materials, labour and capital equipment.

Productivity improves when a given quantity of inputs to the production process is able to produce a greater quantity of goods and services than before. It’s most commonly measured by reference to just one of the inputs, labour. So it’s output per unit of labour, usually per hour worked.

You still see people assuming that some politician or business person saying we need to increase our productivity is really saying we should work harder.

Wrong. The main way to make workers more productive is to give them more or better machines and structures to work with. That is, to invest in more physical capital.

Increasing workers’ education and training – “human capital” – also makes them more productive: better able to work with more sophisticated machines, to think of ways to make machines do better tricks, and think of more efficient ways to organise the work that’s done in a mine, farm, factory, office or shop.

Often, what the better machines and ways of organising things are intended to do is further exploit economies of scale.

Point is, it’s the almost continuous improvement in productivity, year after year, that does most to explain why we are so much more prosperous than our ancestors.

Hence economists’ consternation over the rich world’s unusually weak rate of productivity improvement for the past decade or so, and their search for explanations.

The most popular explanation among them, advanced by Professor Bob Gordon, of Northwestern University in Illinois, is one the rest of us would find hard to credit.

It’s that the present information and communication technology revolution isn’t transforming the economy to the extent that earlier general-purpose technologies – such as electricity, the internal combustion engine, the automated production line, and even running water and indoor toilets – did.

A different, but probably only partial, explanation is that much of the benefits coming from the digital revolution are going unrecognised by a system of national accounts (gross domestic product) designed to measure the industrial economy.

A month ago, I argued that another partial explanation was that the innovations of too many of our brightest and best brains were being used for nothing more productive than finding new ways to get around inconvenient laws and taxes.

Then there’s the notion of “secular stagnation” from Professor Lawrence Summers, of Harvard. Among other things, it says that the ageing of the population and very slow population growth in the rich countries (though not in Australia) means they face a future of weaker growth in consumer spending, thus diminishing the incentive for firms to invest in expansion.

Which links to the much more straightforward – and thus persuasive – explanation offered by former senior econocrat Dr Michael Keating and Professor Stephen Bell, of the University of Queensland, in their book Fair Share.

They argue that the key to productivity improvement is investment – particularly investment by businesses – and the spur to business investment is economic growth and the expectation it will continue.

Innovation is fine, but the main way some new technology is “diffused” throughout the economy is by firms replacing their old machines and structures with new ones that incorporate the latest advances.

Investment is also an essential part of the continuous process of change in the industry structure of the economy, where changes in consumers’ preferences and other developments cause some industries to contract while others expand and new industries emerge.

If firms are reluctant to invest, you don’t get enough expansion to offset the contraction.

What is businesses’ main motive for investing? Their expectations of increased demand for whatever they’re selling, Keating and Bell say.

But this is where the global financial crisis and the Great Recession come in. It was by far the deepest recession the developed world has suffered since the 1930s. The crisis was 10 years ago next month, and the recovery has been particularly weak.

Things in America may look pretty good today – unemployment is very low, profits are high and the economy grew at an annualised rate of 4.1 per cent in the June quarter.

But all is not as it seems. The latest amazing growth is the product of fiscal stimulus from Trump's income tax cuts and won’t last.

Low unemployment conceals a marked fall in the proportion of the population (particularly less-skilled middle-aged men) participating in the labour force.

Many people who lost their job during the recession have given up looking for another one. Their skills have “atrophied” – wasted away – and are a loss of human capital to the US economy.

Keating and Bell show that business investment fell more in this recession than previous ones and has been remarkably slow to recover.

Seeing no great reason to expand, US businesses have been using their profits not to reinvest but to pay big dividends and to buy back their shares on the stockmarket, hoping to boost their price. Trump’s company tax cut has pushed buybacks to record levels.

Get it? Weak economic growth in the advanced economies is discouraging businesses from investing. Weak investment means weak productivity improvement and skills atrophy. But weak productivity means more weak growth.

The authors note that business investment in physical capital, and growth in human capital, are key drivers of the economy’s “potential” growth rate in future years. Neglect them and the economy loses its ability to speed up.

The Organisation for Economic Co-operation and Development calls this a “low-growth trap”. Not an encouraging thought.

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Immigration the cheap and nasty way to grow the economy

The ABC's temerity in hosting a debate about the merits of high population growth has drawn predictable repostes from the economic establishment. Shades of the legendary note in the margin of a politician's speech: "shout here - argument weak".

There are at least four counts against the advocates of high immigration. First, their refusal to engage with the academic environmentalists arguing that we've exceeded the "carrying capacity" of our old and fragile land. Scientists? What would they know?

Second, they keep asserting high immigration's great economic benefits, blithely ignoring the lack of evidence. Whenever the Productivity Commission has examined the issue carefully it's found only small net effects, one way or the other. Its latest modelling found only a "negligible" overall impact.

Third, the advocates not only decline to admit the high social and economic costs that go with high rates of immigration, they decline to accept their share of the tab, doing all they can to shift it to the young, the poor and those on the geographic outer, including many of the migrants.

You rarely hear pro-immigration economists acknowledging the clearest message economic theory gives us on the topic: more population requires more spending on additional public and private infrastructure if material living conditions aren't to deteriorate.

The more we invest in such "capital widening" to stop the ratio of capital to labour declining, the less scope for investment in "capital deepening" to keep the ratio increasing, and so improving the productivity of our labour.

When we fail to invest sufficiently in capital widening – which we have – the decline in living conditions is manifest in overcrowding, traffic congestion and long commuting times.

Why have we failed to invest sufficiently? Partly because a high proportion of the promoters of high immigration are also promoters of Smaller Government, never acknowledging the two are incompatible.

A bigger population requires a bigger government, with more debt, not less. When you persist with high population growth, but put the clamps on government, you end up with overcrowding, congestion and the rest.

Another truth the high immigration advocates refuse to acknowledge is that a much bigger population must lead to much bigger cities and higher-density living in those cities.

The Reserve Bank's estimates of the huge addition to Melbourne and Sydney house prices caused by state governments' acquiescence to resistance to higher density in inner and middle-ring suburbs, are partly a consequence of successful attempts to shift the spatial cost of high immigration onto the less well-placed.

The fourth criticism of high immigration is that it's the cheapest and nastiest way to pursue economic growth. You get a bigger economy, but not the promised benefits. The studies repeatedly fail to show high immigration leads to a significant increase in real income per person.

Of course, the business lobby has no reason to care whether high immigration yields economy-wide benefits. All they're after is a bigger domestic market, allowing them to sell more widgets, make a higher profit and justify a bigger salary package.

Few economists can see this is a cop-out. An escape hatch. As a way of achieving corporate growth, it's even easier than taking over your competitors. And it sure beats the hard graft of trying to increase profits by being more efficient and contributing to national productivity improvement.

As we've seen, high immigration probably comes at the expense of productivity-enhancing (capital-deepening) business investment and public infrastructure. To the extent that inadequate capital-widening leads to overcrowding and congestion, it worsens productivity.

In principle, one productivity-enhancing effect of high immigration is that you get greater human capital on the cheap by pinching it from other (mainly poor) countries.

After foreign students have come here and paid full freight for Australian qualifications, you let them stay and work. You select permanent immigrants on the basis of their skills, or you let skilled workers on temporary visas stay on.

But as Dr Bob Birrell, of the Australian Population Research Institute, has shown, there's a big gap between the claims made for our skilled migration program and the reality. We let in people whose skills aren't in high demand, and plenty of them end up driving taxis because the local professions' gatekeepers refuse to recognise their qualifications.

So it's not clear the benefits of our skill-pinching program exceed the cost of discouraging businesses from incurring bother and cost training enough of our own young people, when you can always get the government to let you bring in someone ready-trained.

High immigration may suit our rent-seeking business people, but it's a hell of a way to pursue the professed benefits of economic growth.

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If we had more sense, we'd push early childhood education

Did I tell you that my grandson, fast approaching his second birthday and not many months away from losing his status as our one and only grandchild, is a budding genius?

His educational development is supervised by his father, who, being a doctor, started with identifying parts of the body. My grandson's always being quizzed, and loves showing off how much he knows.

Already he can count – provided you don't test him too closely above two or three – and, courtesy of Play School, can sing the alphabet song, whether or not he's invited to. He misses no more than a few of the letters, and is always careful to sing zed rather than zee.

Do I worry about how he'll manage to scratch out a living in the looming, frightening world of robots and artificial intelligence? No I don't. Not with the parents he's got.

For centuries the great advantage has been seen as inherited wealth. But, as The Economist magazine pointed out a few years ago, in the knowledge economy it's probably just as advantageous, maybe more, to inherit your intelligence from two highly educated, well-paid, education-conscious and bookish parents.

Of course, not every Aussie kid is as fortunate as any grandchild of mine. Which is why I worry a lot about the continuing high high-school dropout rate. Join the workforce without even a good grasp of the basics and the rest of your working life is likely to be "problematic", as mealy mouthed academics say.

It's also why I get so annoyed with politicians – and Treasury and Finance econocrats – who regard early education as just another of the outstretched hands that must be given something, but never enough to fully exploit its potential to improve our wellbeing, social as well as economic.

The good news is that Simon Birmingham, federal Minister for Education and Training, announced over the weekend the government's decision to spend $440 million extending for a year the "national partnership agreement" on universal access by four-year-olds to early childhood education, while federal and state ministers continue "negotiating" (haggling over) a new long-term agreement.

The bad news is that, when it comes to making sure all children attend preschool, we started much later than most of the other rich countries, and aren't catching up nearly as fast as we would be if we had more sense.

Our politicians on both sides think their interests are best served by using the limited funds available to placate as many interest groups as possible, rather than spending money where it's likely to yield the most lasting benefit.

Our econocrats ought to be encouraging their masters to spend more wisely, but if they are it's news to me. They seem to think it their job to disapprove of all extra spending equally. Not working well so far, guys.

There are no magic bullets in government spending, but putting money into early education – whether by lifting the quality of childcare, or beefing up preschool – comes a lot closer than most of the other things governments spend on.

We've known it for decades, but the evidence keeps growing. According to the Ontario early learning study, "the early years from conception to age six have the most important influence of any time in the life cycle on brain development and subsequent learning, behaviour and health".

Early experiences and stimulating, positive interactions with adults and other children are far more important for brain development than previously realised, it says.

According to a paper on early childhood education, issued last year by Dr Stacey Fox and others, of the Mitchell Institute at Victoria University, "investing in early learning is a widely accepted approach, backed by extensive evidence, for governments and families to foster children's development, lay the foundations for future learning and wellbeing, and reduce downstream expenditure on health, welfare and justice".

While all children benefit from high-quality early learning, research also shows that children experiencing higher levels of disadvantage benefit the most, and can even catch up to their more advantaged peers, the paper says.

In an earlier Mitchell report, Fox says that nearly a quarter of Australian children arrive at school with significant vulnerabilities – in their knowledge and communication, their social skills and emotional wellbeing, or in their physical health.

Here's a surprise: a child's risk of being developmentally vulnerable is closely, but inversely, correlated with their socio-economic status.

After five or six years, we've got close to achieving universal access by four-year-olds to a potential 15 hours a week of preschool. The only state dragging the chain is NSW (yeah, but look how much bigger its budget surplus is).

But kids from disadvantaged homes are less likely to be getting the full 15 hours. And there's strong evidence that two years of preschool – that is, starting at three – yields more than twice the benefit.

British research shows 16 year olds who attended at least two years of preschool were three times more likely to take a higher academic pathway after leaving school.

It's easier to get kids up to speed in preschool than at any later level of education. Clearly, the smart way to improve the performance of the whole system is to start at the bottom. Make sure we get preschool right, and the benefits will flow on to schools, TAFE and uni.

Nah, too much trouble. Let's just give ourselves a tax cut. My grandkids will do fine.

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Worsening school performance is everyone’s business

Amid all the uncertainty about where we'll be left by the many pressures bearing on us and our economy – climate change and digital disruption, for starters – there's one truth we can cling to: the more we enhance our natural capital and our human capital, the better placed we're likely to be.

Unfortunately, seeing the sense of this is a lot easier than ensuring it happens.

On natural capital – the preservation of species and physical resources, and the healthy functioning of the ecosystem – we've got one whole side of politics still struggling to get its climate-change deniers back in their box.

Even on human capital – the acquisition of knowledge and know-how – there's plenty of conflict, ranging from economic rationalists who think constraining the growth in government spending and taxation more important than accruing human capital, to people in the education system who think the adequacy of their present performance is no one's business but their own.

On the one hand, we've got the smaller-government brigade saying the performance of, say, school education can be fixed without spending an extra dollar.

On the other, we have teachers – some of them, anyway – arguing there's no problem that having taxpayers hand over a lot more bucks wouldn't fix.

How would the extra money be spent? That's for teachers and education departments to decide, and for everyone who isn't a teacher – and therefore knows nothing about schools – to mind their own beeswax.

The smaller-government brigade closes its eyes to the need to improve the performance of our schools and to the significant economic and social gains we stand to make by improving that performance.

The size of these gains can be demonstrated using the Fairfax-Lateral Economics index of Australia's wellbeing, compiled by Dr Nicholas Gruen and published every quarter upon the release of the national accounts.

The index overcomes the limitations of gross domestic product as a measure of economic progress by starting with the most appropriate modification of GDP – real net national disposable income – and adding to it estimates of the value of human capital, natural capital, the effects of distributional inequality, environmental amenity, health and employment-related satisfaction.

The measure of human capital takes account of early childhood risk, school performance, tertiary education, innovation (multi-factor productivity) and skills atrophy from long-term unemployment.

The indicator used to measure our progress in school education is the change in our score from the regular testing of our 15-year-olds' reading ability under the OECD's Program for International Student Assessment.

Our kids' reading score has fallen almost continually since 2000, from 528 to 503, or 4.7 per cent. By comparison, Canada's score has declined only marginally over the period, from 534 to 527.

The index's estimates suggest that, were we able to lift our score only to Canada's level, this would increase the value of our human capital by almost $17 billion a year.

That's equivalent to about 1 per cent of GDP – far more than promised by almost any other proposed economic reform, including cutting the company tax rate.

Putting it another way, had our 15-year-olds' performance not deteriorated since 2003, the estimated value of the human capital – know-how – in the heads of this year's 15-year-olds would be $17 billion greater than it is.

Our kids' academic performance in each of the areas measured in the PISA tests – reading, maths and science – has been deteriorating, though at differing rates. This is worse than the picture shown by successive NAPLAN test results, summarised as flat to down.

This is why teaching is a problem too important to be left to teachers. The more so because some teachers – a minority, I trust – have become hyper-defensive, refusing to acknowledge there's a problem, telling themselves that, if there is a problem, it's everybody's fault bar their profession's, and branding any non-teacher who dares to offer an opinion a "teacher-basher".

Julia Gillard's attempt to use the measurement (via NAPLAN) and publication (via the My School website) of students' and schools' academic performance to raise standards by fostering competition between schools was misguided – pseudo-economic – and has failed.

But too much of the resistance and criticism of NAPLAN and My School arise from some teachers' desire to continue avoiding public accountability for the quality of their work.

It should go unmeasured (because fault can be found with every form of measurement humans have tried) and, to the extent that performance information exists, it should remain confidential to insiders, because outsiders lack the expertise to interpret it correctly.

Sorry guys, but more money comes at the price of greater accountability to, and scrutiny by, the mug taxpayers who cough it up.

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We're not taking productivity seriously

Given our obsession with materialism, productivity "isn't everything, but in the long run it is almost everything," as Paul Krugman famously said. If so, the intergenerational report's consideration of the topic is quite inadequate.

It's partial in both senses. It mentions most of the key factors that influence productivity improvement - defined as increased goods and services produced per hour worked - but doesn't do justice to many, including climate change.

That's partly because, though the report purports to be about the future of the economy, its real target is Treasury's eternal top priority, the future of the budget balance.

But it's also because the econocrats are leading us towards their preferred policy response to our alleged productivity problem and away from those responses their "priors" - preconceived beliefs about how the world works - cause them to disapprove of.

There are two broad approaches to government efforts to improve productivity: one which involves more intervention and spending and one which involves less intervention and little change in spending. Guess which one Treasury's priors lead it to favour?

For the past 200 hundred years, most of the world's productivity improvement has come from technological advance - people inventing better machines and thinking of better ways to do things.

But the other fish Treasury wants to fry prompt it to embrace an extreme view held by a few American economists that we've entered a period of much less rapid technological change.

When you consider all the disruption the digital revolution is unleashing on so many industries this is hard to believe.

In the era of the knowledge economy, you'd expect much long and earnest discussion about what governments should and shouldn't be doing to encourage acquisition of the "human capital" that comes from education and training.

Should we be cutting budgetary support for science and research and development? Is now the right time to be pushing university funding off the budget and on to students and universities' money-making schemes?

Why would a government that professes to believe in "equality of opportunity" welch on its professed support for the Gonski reforms to school funding? Why would it view Gonski as about private versus public rather than about lifting the future participation and productivity of kids at the bottom of the distribution?

Instead, the issue of human capital is airily dismissed with the line that "there is little evidence that slower productivity growth has been the result of inadequate investment in skills, education and innovation more broadly".

Maybe. But it's probably equally true there's little evidence it hasn't been. All you're really saying is that there's little evidence - because we've never been willing to run to the expense of adequately measuring such a vital ingredient in our future wellbeing.

The other key element of productivity improvement that gets short shrift is public infrastructure spending. To what extent are its inadequacies limiting the productivity of businesses and adding to commuting times (an important part of our wellbeing that doesn't show up in gross domestic product)? But do workers who spend an hour getting to work arrive at their productive best?

No discussion of our present and future productivity performance is adequate without assessment of the role being played by our policy of high immigration. But all we get is the throwaway line that "there is some evidence that" high levels of migration increase productivity because our focus on skilled migration raises the workforce's average skill level and because "migrants can be highly motivated".

This is true and quite dishonest at the same time. It minutely examines the dog in the room while studiously ignoring the elephant. What economists know but try not to think about - and never ever mention in front of the children - is that immigration carries a huge threat to our productivity.

The unthinkable truth is that unless we invest in enough additional housing, business equipment and public infrastructure to accommodate the extra workers and their families, this lack of "capital widening" reduces our physical capital per person and so reduces our productivity.

Think of it: the very report announcing that our population is projected to grow by 16 million to 40 million over the next 40 years doesn't say a word about the huge increase in infrastructure spending this will require if our productivity isn't to fall, nor discuss how its cost should be shared between present and future taxpayers.

No, none of that. Just another repetition of that peculiarly Australian doctrine that pretty much the only way to improve productivity is to engage in unceasing micro-economic reform.

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Economists should learn some geography

One of the great failings of economists is their confident assumption that their way of looking at the economy is the only way - certainly, the only useful way - of understanding it.

For one thing, their almost exclusive focus on money - prices, actually - and their convenient assumption that people are rational, allows them to analyse an economy populated by automatons rather than fallible, flighty humans.

Behavioural economics and economic sociology attempt to correct this deficiency.

But there's another way of studying the economy that most economists take little interest in, to the detriment of their understanding of how the economy ticks: its spatial dimension. This failure is getting more costly as we move to a knowledge economy.

Why isn't economic activity spread pretty much evenly across our vast continent? Why is almost all of it concentrated around our coastline?

For most of our states, up to three-quarters of their economic activity is concentrated in their capital city, which is also the state's first site of white settlement. This is partly an accident of history. Newcomers tend to settle where other people are already settled.

But economic geographers have long known there's also a lot of economic logic to where people settle. Farmers tend to settle where the most arable land is. Mines have to be built where the minerals are.

Manufacturers have to decide whether to build their factories close to where their raw materials are or close to where their customers are. They usually decide to set up in cities, often on the outskirts of cities where land is cheaper.

What's more, many of the firms in a particular industry will gravitate to the same city, usually a big one. Why? So as to exploit "economies of agglomeration".

You've heard of economies of scale. Economies arise when similar firms agglomerate (cluster together). Workers with skills relevant to that industry are attracted to that city, meaning firms have less trouble getting the skilled workers they need. Workers who lose their jobs at one firm may not need to move house to get another job at a similar firm.

Likewise, the manufacturers and their suppliers of specialist equipment and materials each benefit by being close to each other. Firms in the same business can keep an eye on each other, copying anyone who gets on to a better way of doing things. That way, the whole industry gets more efficient at a faster rate.

All this has long been understood by economic geographers. But the advent of the knowledge economy has given agglomeration economies a major new twist and added to the economic significance of big cities, as the report, Mapping Australia's Economy: cities as engines of prosperity, by Jane-Frances Kelly and Paul Donegan, of the Grattan Institute, has pointed out.

"Today the Australian economy is no longer driven by what we make - the extraction and production of physical goods - but rather by what we know and do. Like other advanced economies around the world, our economy is continuing to become more knowledge-intensive, more specialised and more globally connected," the report says.

"Knowledge-intensive businesses - which are the most productive today - tend to cluster and thrive in the centres of large cities."

It turns out economic activity in Australia is concentrated in and around large cities, but is not distributed evenly within cities. Central business districts and inner-city areas are especially important: they represent substantial concentrations of employment, but even more intense concentrations of economic activity. In other words, CBD workers have a lot higher productivity than other workers.

The report explains that "the more highly skilled and specialised a job, the greater the need to find the best person to fill it. This is especially important when the work involves knowledge, expertise, judgment and learning".

Being close to suppliers, customers and rivals helps businesses generate new business opportunities and ideas for products and services, and better ways of working. These transfers of expertise, new ideas and process improvements that occur through interactions between businesses are called "knowledge spillovers" (a class of "positive externality").

Within cities, CBDs and inner-city areas offer the most opportunities for face-to-face contact among workers, essential to benefiting from knowledge spillovers. Spillovers often involve combining and recombining knowledge to come up with new products and ways of working.

Workers build on each other's thoughts, jointly solve problems and break through impasses. Trust is essential, and these kinds of complex conversations are best had in person.

"High-speed broadband and other advances in communication technologies will never replace the importance of face-to-face contact," we're told.

Grattan's research finds that residential patterns and transport systems mean CBD employers have access to only a limited proportion of workers in metropolitan areas. Turning that around, many workers, particularly in outer suburbs, have access to only a small proportion of jobs across the city.

For instance, in some outer suburban growth areas of Melbourne, just 10 per cent of the city's jobs can be reached within a 45-minute drive. If work journeys are made by public transport it's worse.

The report warns that, unless governments lift their game, "Australian cities are likely to continue to spread outwards, further increasing the distance between where many people live and the most productive parts of large cities". This would harm productivity - and workers' opportunity to get ahead.

The point is, governments need to understand the economy's spatial dimension and respond by ensuring transport networks better connect employees with employers, and businesses with their customers and suppliers. Continue letting congestion worsen and you cause productivity to be lower than otherwise, not to mention adding misery to people's lives.

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