That voodoo that you do: The bitter, political fight to create a new macroeconomics | T... - 0 views
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THE big debates in macroeconomics have never been polite. I suppose it's understandable that this is the case; after all, the stakes are high
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, politics is how we resolve lots of really important, really difficult issues. One could indeed argue that the problems we face are the worse because there has been too little politicisation.
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Mr Cowen's view of dispassionate progress in macroeconomics is just not how things usually work. In the 1970s it was not the case, for example, that rival macroeconomic camps settled their differences, then alerted the world of the new consensus so it could be acted upon. Instead you had bitterly divided academics; you had a political ideology which saw some things it liked in one of the camps, which made those things a part of a successful political programme, and which took a policy gamble; and that gamble created new evidence which informed (though by no means settled) the debate over how inflation and monetary policy and expectations all work. The same thing happened in the 1930s. And in the 1980s, when the original voodoo economics had its day in the sun.
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Economists might not like it, but this is how the world will find its way out of the current mess. Not by the calm resolution of disagreements between Larry Summers and John Cochrane, but by the increasing politicisation of a set of radical economic ideas, of one sort or another, which eventually find their way into the practical political programme of a party with a mandate to govern.
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And then they'll do what they do and we will learn something about who was right and who was wrong, and a few economists will change their minds, but most will find a way to tweak their old models so that the new evidence looks like an affirmation of what they believed all along.
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So what does that tell us about how macroeconomists ought to behave? Well, as scientists, they have an obligation to state their hypotheses as clearly as possible, to make testable predictions whenever possible, and to be rigorous and transparent in gathering evidence to support or falsify those predictions
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But macroeconomics is also inherently political, and the practitioners who seek to "politicise" their ideas and make them a political reality play as vital a role in the advancement of the field as the scrupulously apolitical academics