Richard Alford: If War Is Too Important To Be Left To The Generals, Isn’t Economic Policy Too Important To Be Left To Economists?
By Richard Alford, a former economist at the New York Fed. Since then, he has worked in the financial industry as a trading floor economist and strategist on both the sell side and the buy side.
Apologies to both Clemenceau (Prime Minister of France 1917-1920) and General Jack D. Ripper (Dr. Strangelove 1964)
The recent crisis and continuing economic and financial dislocations has led many to question the usefulness of the current macroeconomic paradigm, if not economics more generally. Raghuram Rajan, whose paper, “Has Financial Development made the World Riskier,” was summarily dismissed at the Fed Jackson Hole Conference in 2005, has recently posted a piece titled “Why Did Economists Not Foresee the Crisis?” In this piece, Rajan rejects three popular explanations for the failure of economics and economic policy, i.e. the absence of “models that could account for the behavior”, “ideology”, and “corruption”. Rajan offers alternative explanation(s): “I (Rajan) would argue that three factors largely explain our (economists) collective failure: specialization, the difficulty of forecasting, and the disengagement of much of the profession from the real world.” The logical conclusion of Rajan’s explanation(s) is that to avoid future crises, the role of economists, or at least academic economists, in the policy formulation process should be reduced. More troubling yet for economists, including Rajan, is some recent work by Frydman and Goldberg which argues that current economic models are inherently flawed.
Rajan dismisses the argument that economics lacked relevant models. He cites the fact that academic economists have studied and modeled many of the factors that contributed to the crisis. Rajan does, however, cite the compartmentalization of economics which leaves macroeconomists ignorant of findings in other sub-disciplines of economics.
In Rajan’s view, the inability to forecast accurately reflects shortcomings in the current model. All models of the economy abstract from the complexities of the economy and financial system. Models are simplifications of realty. Hence the models are incorrect. (We will return to this point later.) The only questions are how large and costly will the model-driven errors be.
Observers should not be surprised by the fact that the models employed by economists contained simplifying assumptions. However, they should be disturbed by the recent performance of policymakers. They ought to ask the question: why did economists remain wedded to their model despite the growth of all the macro-economically important economic and financial imbalances and unsustainabilities that existed in the years prior to the crisis?
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