Economists not only failed to anticipate the financial crisis; they may have contributed to it—with risk and derivatives models that, through spurious precision and untested theoretical assumptions, encouraged policy makers and market participants to see more stability and risk sharing than was actually present. Moreover, once the crisis occurred, it was met with incomprehension by most economists because of models that, on the one hand, downplay the possibility that economic actors may exhibit highly interactive behavior; and, on the other, assume (...) that any homogeneity will involve economic actors sharing the economist’s own putatively correct model of the economy, so that error can stem only from an exogenous shock. The financial crisis presents both an ethical and an intellectual challenge to economics, and an opportunity to reform its study by grounding it more solidly in reality. (shrink)

The financial crisis was caused by the complex, constantly growing web of regulations designed to constrain and redirect modern capitalism. This complexity made investors, bankers, and perhaps regulators themselves ignorant of regulations previously promulgated across decades and in different “fields” of regulation. These regulations interacted with each other to foster the issuance and securitization of subprime mortgages; their rating as AA or AAA; and their concentration on the balance sheets (and off the balance sheets) of many commercial and investment banks. (...) As a practical matter, it was impossible to predict the disastrous outcome of these interacting regulations. This fact calls into question the feasibility of the century-old attempt to create a hybrid capitalism in which regulations are supposed to remedy economic problems as they arise. (shrink)

ABSTRACT Tetlock's Expert Political Judgment is a creative, careful, and mostly convincing study of the predictive accuracy of political experts. My only major complaints are that Tetlock (1) understates the predictive accuracy of experts, and (2) does too little to discourage demagogues from misinterpreting his work as a vindication of the wisdom of the average citizen. Experts have much to learn from Tetlock's epistemological audit, but there is still ample evidence that, compared to laymen, experts are very good.

ABSTRACT Economists not only failed to anticipate the financial crisis; they may have contributed to it—with risk and derivatives models that, through spurious precision and untested theoretical assumptions, encouraged policy makers and market participants to see more stability and risk sharing than was actually present. Moreover, once the crisis occurred, it was met with incomprehension by most economists because of models that, on the one hand, downplay the possibility that economic actors may exhibit highly interactive behavior; and, on the other, (...) assume that any homogeneity will involve economic actors sharing the economist’s own putatively correct model of the economy, so that error can stem only from an exogenous shock. The financial crisis presents both an ethical and an intellectual challenge to economics, and an opportunity to reform its study by grounding it more solidly in reality. (shrink)