"how govt prolonged the Great Depression"

The title of a piece by Harold Cole and Lee Ohanian in the WSJ...

The New Deal is widely perceived to have ended the Great Depression, and this has led many to support a "new" New Deal to address the current crisis. But the facts do not support the perception that FDR's policies shortened the Depression, or that similar policies will pull our nation out of its current economic downturn.

The goal of the New Deal was to get Americans back to work. But the New Deal didn't restore employment....Even comparing hours worked at the end of 1930s to those at the beginning of FDR's presidency doesn't paint a picture of recovery. Total hours worked per adult in 1939 remained about 21% below their 1929 level, compared to a decline of 27% in 1933. And it wasn't just work that remained scarce during the New Deal. Per capita consumption did not recover at all, remaining 25% below its trend level throughout the New Deal, and per-capita nonresidential investment averaged about 60% below trend. The Great Depression clearly continued long after FDR took office.

Why wasn't the Depression followed by a vigorous recovery, like every other cycle? It should have been. The economic fundamentals that drive all expansions were very favorable during the New Deal. Productivity grew very rapidly after 1933, the price level was stable, real interest rates were low, and liquidity was plentiful. We have calculated on the basis of just productivity growth that employment and investment should have been back to normal levels by 1936. Similarly, Nobel Laureate Robert Lucas and Leonard Rapping calculated on the basis of just expansionary Federal Reserve policy that the economy should have been back to normal by 1935....

So what stopped a blockbuster recovery from ever starting? The New Deal. Some New Deal policies certainly benefited the economy by establishing a basic social safety net through Social Security and unemployment benefits, and by stabilizing the financial system through deposit insurance and the Securities Exchange Commission. But others violated the most basic economic principles by suppressing competition, and setting prices and wages in many sectors well above their normal levels. All told, these antimarket policies choked off powerful recovery forces that would have plausibly returned the economy back to trend by the mid-1930s....

By the late 1930s, New Deal policies did begin to reverse, which coincided with the beginning of the recovery. In a 1938 speech, FDR acknowledged that the American economy had become a "concealed cartel system like Europe," which led the Justice Department to reinitiate antitrust prosecution. And union bargaining power was significantly reduced, first by the Supreme Court's ruling that the sit-down strike was illegal, and further reduced during World War II by the National War Labor Board (NWLB), in which large union wage settlements were limited by the NWLB to cost-of-living increases. The wartime economic boom reflected not only the enormous resource drain of military spending, but also the erosion of New Deal labor and industrial policies....

President Barack Obama and Congress have a great opportunity to produce reforms that do return Americans to work, and that provide a foundation for sustained long-run economic growth and the opportunity for all Americans to succeed. These reforms should include very specific plans that update banking regulations and address a manufacturing sector in which several large industries -- including autos and steel -- are no longer internationally competitive. Tax reform that broadens rather than narrows the tax base and that increases incentives to work, save and invest is also needed. We must also confront an educational system that fails many of its constituents. A large fiscal stimulus plan that doesn't directly address the specific impediments that our economy faces is unlikely to achieve either the country's short-term or long-term goals.