Essays on the Great Depression

Bernanke collected his academic research on the Depression, written over roughly two decades before he joined the Federal Reserve. These are journal papers with connecting commentary rather than a general history.

The first body of work concerns the international transmission. Bernanke and Harold James showed, using cross-country data, that the severity and duration of the Depression in each country depended primarily on how long that country remained on the gold standard. Countries that left early, including Britain in 1931, recovered earlier; countries that stayed, including France and the gold bloc, suffered longer. This established the gold standard as the mechanism through which the contraction propagated internationally and as the constraint that prevented monetary response, and it is now the standard account.

The second body of work is his most cited contribution: the non-monetary effects of the financial crisis. Friedman and Schwartz had argued that the banking collapse mattered because it contracted the money supply. Bernanke argued it also mattered through a separate channel: banks accumulate specific knowledge about their borrowers, and when banks fail that knowledge is destroyed, so the cost of intermediating credit rises and creditworthy borrowers cannot obtain funding regardless of the money supply. He showed empirically that the cost of credit intermediation predicts output beyond what monetary aggregates explain. This credit channel argument shaped his own actions as Federal Reserve chairman in 2008.

Other papers cover nominal wage rigidity and why real wages rose during the contraction, the aggregate supply relationship, and the debt deflation mechanism through which falling prices increase the real burden of nominal debt.

The papers are technical and require econometrics. Bernanke's later 21st Century Monetary Policy, also in this reference, is the accessible treatment.