A recurring theme in my writing this year has been to point out the limitations of gross domestic product as a measure of wellbeing, particularly as related to the environment. But today I have good news: something is being done about it. Economists and statisticians long ago developed a "system of national accounts" to measure developments in the economy, based on Keynesian theory about how economies work.
Although these accounts give much detail about income, production, spending and saving during a period and, these days, a balance sheet outlining the values of the nation's assets and liabilities to the rest of the world on the last day of the period, we tend to focus on a single bottom line: the change in the real value of goods and services produced during the period, otherwise known as GDP.
A United Nations commission sets down an international standard for all countries to follow in preparing their national accounts, using the same theory, concepts and definitions so each country's figures are comparable and can be added together to give gross world product. But as we've become more aware of the problems economic activity is creating for the natural environment - degradation of rivers and soil, depletion of non-renewable resources, use of renewable resources faster than their ability to renew themselves, destruction of species and generation of waste and pollution, including greenhouse gases - we've realised that little of this cost is taken into account in measuring the change in our income.
It's as though we've been thinking of and measuring "the economy" - the production and consumption of goods and services - in total isolation from the natural environment in which the economic activity occurs.
The environment provides the economy with many "ecosystem services", which a leading ecological economist, Professor Robert Constanza, of Portland State University, defines as "the benefits provided to humans through the transformations of resources (or environmental assets, including land, water, vegetation and atmosphere) into a flow of essential goods and services,
for example clean air, water and food".
These ecosystem services are treated as though they're "free goods" - goods in such abundant supply they have no value or cost - while, as we've seen, most of the damage economic activity does to the ecosystem is also ignored.
The main reason for these limitations is that, with some exceptions, the national accounts and GDP don't actually measure "the economy" but rather market transactions within the economy. So, for instance, it ignores all the production and consumption that occurs within households without money changing hands. It measures professional sport, but not amateur sport.
It's clear we can't go on effectively ignoring the relationship between the economy and the environment. The damage economic activity does to the environment diminishes our wellbeing, as well as rebounding on the economy and damaging it. We can go on ignoring the damage excessive irrigation is doing to the Murray-Darling so as to avoid disrupting the livelihoods of the irrigators, but if we eventually turn the river into a drain, irrigation will be no more.
We need to recognise and measure the interrelationship between the economy and the environment because we don't want to give ourselves a false impression of the progress we're making, even in a narrow, material sense. Measurement is important because "what we measure affects what we do; and if our measurements are flawed, decisions may be distorted".
To this end the UN commission and its member national statistical agencies have agreed on a "system of integrated environmental and economic accounting", which will become an international standard in 2012. This brings environmental and economic information together within a common framework, meaning information from each side is on a comparable basis and can thus be combined.
Well that's great. But our longstanding focus on purely economic measurement means we don't yet collect all the data we would need to produce environmental accounts that could be integrated with the economic accounts to give us a more balanced picture of the progress we're making (although, of course, this says nothing about other dimensions of progress, such as the quality of our health, extent of our education, inequality in the distribution of income and treatment of minorities).
It turns out the efforts of our Bureau of Statistics have been concentrated heavily on collecting the reams of statistical information needed to produce the quarterly national accounts.
So that's the first stumbling block. The second is that, with the environment, you have to start with physical measures (millilitres, petajoules, hectares or tonnes) then see if you can convert them to dollar values - as they must be if they're to be combined with the economic accounts. (That's the problem with non-market activities, of course. When something is bought or sold, you know its dollar value.)
The bureau of stats has issued a paper describing its progress in moving Towards an Integrated Environmental-Economic Account for Australia. It needs to produce six accounts that will add up to the environmental side.
A water account (released a few weeks ago and now to be produced annually) includes the physical flows of water supplied to, and used by, the economy, and water returns to the environment. It includes monetary supply and use tables and indicators of the water productivity of industries.
An energy account (to be produced annually from mid next year) includes physical and monetary supply and use tables for various energy products, by industry. A land account (to be produced annually from early next year) includes physical and monetary land use by industry, land cover by industry and changes in land cover over time.
An "environmental protection expenditure" account (to be produced annually from late 2012) gathers together protective spending already included in GDP for things such as waste water treatment. A waste account (to be produced three-yearly from late 2012) covers physical generation and disposal of waste by industry, type of waste and destination.
It would be nice if, having done all this measurement, we could produce from the integrated environmental-economic accounts a single, bottom-line figure for "green GDP", that we could watch as closely as we watch the present brown GDP. As yet, however, the world's statistical agencies haven't agreed on a definition of green GDP, nor agreed on how to convert all physical quantities into dollar values. But there will be enough information to allow outfits or academics to calculate their own versions of green GDP using their own assumptions. And it should be possible to produce a figure for GDP after adjustment for environmental depletion and degradation.
That will be a big step forward.
