Much argy-bargy on the way to next week’s off-again, on-again budget

What the press gallery seems not to know is the reason for the modern practice of governments providing an economic statement immediately before announcing an election – unless, of course, the election is called immediately after a budget’s been delivered, as will happen next week for the third election in a row.

Why must the officials’ PEFO always be preceded by a government economic statement in some form? So an excitable media won’t leap to the conclusion that any deterioration in the budget balance since the previous government statement represents the econocrats revealing something their political masters were hiding.

Guess what? The politicians’ statement and the PEFO a week or two later are always almost identical. (And I bet it was the econocrats who suggested the idea to the pollies. The last thing the bureaucrats want is to embarrass the duly elected government of the day.)

But enough already on the politics of budgets. Better get to some actual economics. I don’t expect to believe the economic forecasts we see in next week’s budget. Why not? Because they’re highly likely to be wrong. Economists are hopeless at forecasting even just a year ahead because the models they rely on – whether mental or mathematical – are so woefully oversimplified.

That being so, the forecasters’ rule of thumb is to predict “reversion to the mean”. If last year was below average, this year growth will be up; if last year was above average, this year growth will be down.

Don’t let the modern practice of exaggerating the significance of government policy measures by quoting their expected cost “over four years” mislead you.

As well, when times are tough, official forecasts tend to err on the optimistic side. (This is no bad thing when, to some extent, their forecasts tend to be self-fulfilling; the last thing we need is the government predicting death and destruction.)

But I’m under no such constraint. And I can’t see the economy getting out of second gear in the financial year ahead. The obvious reason for expecting further weak growth is the effect of all Trump’s antics. But this factor is easy to overestimate. Unlike some countries, we don’t do much trade with the US.

The media have tended to exaggerate the likely effect on us of all Trump’s off-again, on-again tariffs to make it a better story. The ultimate effect on us will come mainly via China, our biggest export destination, but the Chinese have their own ways of protecting themselves in the unending tussle with the Yanks for the title of top dog.

What’s likely to have a bigger effect on us is the uncertainty about how Trump’s craziness will play out. Uncertainty has real effects when it prompts businesses and even households to delay investment decisions until the prospects are clearer.

So there will be some adverse effect on our economic growth. Even without Trump, however, it’s too easy to sound wise by making a big thing of what’s happening in the rest of the world. Never forget that roughly three-quarters of all the goods and services we produce are bought by Australians, while roughly three-quarters of all the goods and services we buy are made by Australians.

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On the positive side for economic growth, it can’t be long before the Reserve Bank cuts interest rates back to their normal or “neutral” level. But that suggests a total cut of only 1 percentage point or so. It won’t set the world on fire.

Similarly, the parties’ many election promises will add to government spending and act as a stimulus to the economy and private spending. But again, don’t let the modern practice of exaggerating the significance of government policy measures by quoting their expected cost “over four years” mislead you.

From the perspective of the budget’s immediate effect on economic growth, it’s only the cost of the measure in the first year that matters. And, because we’re measuring annual growth, it’s only any increase on the first year’s spending that matters.

The fancy mathematics economists indulge in is overrated, but simple arithmetic isn’t.

Ross Gittins is the economics editor

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