It's the holidays, so let's have some fun with economic puzzles

So it’s holiday season, when (almost) everyone takes a break, chills out and tries not to think about workaday worries. So let’s have some fun. Let’s do a few economic puzzles.

There’s an old joke in economics that says, “it may work in practice, but does it work in theory?” If you take that to mean economists care more about getting their theory right than about its usefulness then, yes, too many of them do.

But an empirical revolution is happening in economics, where economists test their standard theory to see how well it explains the real world. A big part of this is the rise of “behavioural economics” which, rather than simply making the conventional assumption that everyone acts “rationally” – with carefully considered self-interest – in the economic decisions they make, studies the many reasons people often make decisions that aren’t rational.

So, first puzzle. When, in 2012, prime minister Julia Gillard introduced what she called a “price on carbon” and opposition leader Tony Abbott correctly labelled a “carbon tax”, which increased the price of electricity, she took care to cut income tax and increase pensions in a way designed to leave households on average incomes no worse off.

Among Abbott’s many criticisms, he claimed the move would fail to reduce electricity consumption because people would simply use their tax cut to allow them to keep buying the same amount of power. Puzzle: conventional economics says Abbott was wrong, but behavioural economics suggests he may have had a point.

In compensating most people for the cost of her carbon tax, Gillard was doing just as economists advised. They were confident people would still reduce their electricity use because theory says a change in the price of some item has two, conflicting effects: the income effect and the substitution effect.

The income effect reduces the consumer’s real (after-inflation) income, whereas the higher price relative to the prices of similar items encourages the consumer to substitute other items for the now-dearer item, at least to some extent.

So even though Gillard’s compensating tax cut eliminated the income effect, economists were confident the remaining substitution effect would still encourage people to use less electricity and use what was left of their tax cut on something else they wanted more of.

But behavioural economics says maybe it’s not that simple. One of its early and major findings is that many people are “loss averse” – they hate losing money from the increase in the price of electricity more than they like getting the money back as a tax cut.

So, contrary to theory, many people wouldn’t have felt the tax cut left them no worse off. If so, they may well have chosen to use all their tax cut to keep buying the same amount of electricity.

For the record – and for whatever reason or reasons (remember, this wasn’t an experiment where all else was held equal) – electricity sales and emissions of carbon dioxide fell sharply during the two years before the Abbott government abolished the “carbon pricing mechanism”.

Then they rose again. History will not be kind to that man.

Second puzzle. An ABC series called How to Live Younger presented scientific evidence showing that regular exercise throughout life can rewind the clock on cognitive (mental) decline, fight cancer, prevent disease, beat depression and even enhance our lives by making us smarter and more creative.

So people who’ve exercised throughout their lives generally do much better in old age. It’s also true that people who aren’t used to exercising find it harder to start working out and so don’t get as much “utility” - enjoyment and benefit – from exercising.

The economists’ convention model of “rational decision-making” predicts that knowledge of all this will lead parents to encourage their children to exercise and lead kids to keep it up as young adults and in middle age, thus setting themselves up for a healthy, happy old age.

Doesn’t always happen that way, you say? True. By why not?

Because, as behavioural economists recognise, many people, even those who fully understand how keeping fit will benefit them in old age, still have trouble making themselves exercise regularly. If they get out of the habit, it’s hard to get back into it.

A finding of behavioural economics is that this is partly explained by the “projection bias” that affects the thinking of many people. They mistakenly believe that the benefit they enjoy from exercise at this stage of their life will be the same in later stages. Actually, they’ll benefit more in later stages if they keep exercising now; if they give up exercise now they’ll find it harder to take it up again later.

So, whereas conventional economics can’t see there’s a problem – also with adverse consequences for the health system and the taxpayer – behavioural economics can see it. It can see the case for a government education campaign to help people overcome their projection bias, for instance.

And there are techniques individuals use to overcome their projection bias, short-sightedness and lack of willpower. Psychologists call such techniques "commitment devices". I did little exercise until, in my late 40s, a diabetes doctor ordered me to start.

I’ve been able to keep going to the gym two or three times a week since then, and I enjoy it. The tricks I’ve used to keep it up are to have a highly qualified trainer and go at set times with a bunch of gym buddies who’ve become good friends.

A couple of times last year I criticised academic economists for not doing enough to make their theories more realistic – and more useful to the students they teach.

The two “puzzles” we’ve just looked at are derived from a university exam paper in behavioural economics, sent to me in response to my criticisms by Professor Simon Grant, of the Australian National University.

It seems that, at least at our better universities, economists don’t just bang on with conventional theory oblivious to its limitations.

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There are many ways to stuff up productivity

A good New Year’s resolution for readers of the business pages would be to read more widely and think more broadly, so their thinking about economic problems and their solutions doesn’t get into a rut, returning repeatedly to the same old solutions to the same problems.

No reader of these pages needs to be told that the key to higher material living standards is improved productivity – the ability to create more outputs from the same quantity of inputs of land (raw materials), labour and physical and intangible capital.

Almost continuous productivity improvement over the past two centuries is the outstanding achievement of capitalist, market economies, the proof of capitalism’s superiority as a system of organising production and consumption.

It’s what’s made us so much more prosperous than our forebears were, with much of that prosperity spilling over from the owners of capital to the middle class and people near the bottom.

But, as I’m sure you know, over the past decade or so the rate of productivity improvement in Australia and all advanced economies has slowed to a snail’s pace. Hence, all the talk about productivity and what we can do improve its rate of improvement.

So far, a decade of hand-wringing hasn’t got us anywhere. We need to think more broadly about the problem.

One new thought is to wonder if there is – or should be – more to the good life than economic growth and a higher material standard of living. If there are ways we could improve the quality of our lives even if they didn’t lead to us owning more and better toys.

A negative way to express the same thought is to wonder if being able to afford better houses and cars will be much consolation if we succeed in stuffing up our climate, with more heat waves, rainy summers, droughts, bushfires, floods, cyclones and a rising sea level.

But we’ll return to those thoughts another day, and descend now to the more prosaic. One rut we’ve got into is thinking it’s up to the government to lift our productivity by “reforming” this or that intervention in the economy.

This is model-blind thinking on the part of econocrats, hijacked by rent-seeking businesses and high income-earners wanting more power to limit the earnings of their employees and more of the tax burden shifted to other people in the name of improving “incentives”.

The same people show little interest in reforms that really would increase economic growth by increasing women’s participation in paid work, such as free childcare.

Another rut we’re in is thinking that we won’t get faster economic growth until we get back to faster productivity improvement.

This has much truth, but it misses the deeper truth that the relationship between economic growth and productivity can also run the other way: maybe we’re not getting faster productivity improvement because we’re not getting enough economic growth.

In practice, what does much to increase the productivity of labour is businesses – in mining, farming and manufacturing, but also the service industries – replacing old machines with the latest, most improved models.

But business investment has long been at historically low levels, making our weak productivity performance hardly surprising. And the dearth of new investment spending is also hardly surprising considering consumer spending has been so weak for so long.

Nor is weak consumer spending surprising when you remember how weak the growth in real wages has been. One reason wage growth has been so weak, as Reserve Bank governor Dr Philip Lowe has pointed out, is the present fashion of businesses using any and every means – legal or otherwise – to limit labour costs and so increase profits. There are other paths to profitability.

While we’re thinking unfamiliar thoughts on the possible causes of our productivity plateau, remember this one: when businesses have been investing strongly in new equipment in the past, it’s often been a time when labour costs have been rising rapidly, giving them a strong incentive to invest in labour-saving machines.

(Note, it’s precisely because this increases the productivity of labour, and thus increases real national income, that the pursuit of labour saving simply shifts the demand for labour from goods-producing industries to services-producing industries, leaving no decline in the demand for labour overall.)

Last year some economists at the International Monetary Fund wrote a blog post on yet another contributor to weak productivity improvement, which will certainly come as a surprise to “Brother Stu,” federal Education Minister Stuart Robert, who late last month sent a “letter of expectations” to the government’s Australian Research Council outlining the Morrison government’s desire to prioritise short-term research jobs that service the interests of commercial manufacturers.

It’s possible he and Scott Morrison merely wish to swing one for the Coalition’s generous business backers, but my guess is they imagined they were striking a blow for higher productivity. If so, they’ve been badly advised.

Research by the IMF economists finds that productivity improvement in the advanced economies has been declining despite steady increases in research and development, the best indicator we have on “innovation” effort, the thing so many business people give so many speeches about.

But get this: they find that what matters for economic growth is the composition of spending on R&D, with basic scientific research affecting more sectors for a longer time than applied research (commercially oriented R&D by companies).

“While applied research is important to bring innovations to market, basic research expands the knowledge base needed for breakthrough scientific progress,” they say.

“A striking example is the development of COVID-19 vaccines which, in addition to saving millions of lives, has helped bring forward the reopening of many economies . . . Like other major innovations, scientists drew on decades of accumulated knowledge in different fields to develop the mRNA vaccines.”

Which suggests the Morrison government has just jumped the wrong way in its latest intervention into the affairs of our universities. Should have done more R&D of their own before jumping.

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