David Leonhardt: The Depression: If Only Things Were That Good

David Leonhardt is The New York Times Washington bureau chief.

UNDERNEATH the misery of the Great Depression, the United States economy was quietly making enormous strides during the 1930s. Television and nylon stockings were invented. Refrigerators and washing machines turned into mass-market products. Railroads became faster and roads smoother and wider. As the economic historian Alexander J. Field has said, the 1930s constituted “the most technologically progressive decade of the century.”

Economists often distinguish between cyclical trends and secular trends — which is to say, between short-term fluctuations and long-term changes in the basic structure of the economy. No decade points to the difference quite like the 1930s: cyclically, the worst decade of the 20th century, and yet, secularly, one of the best.

It would clearly be nice if we could take some comfort from this bit of history. If anything, though, the lesson of the 1930s may be the opposite one. The most worrisome aspect about our current slump is that it combines obvious short-term problems — from the financial crisis — with less obvious long-term problems. Those long-term problems include a decade-long slowdown in new-business formation, the stagnation of educational gains and the rapid growth of industries with mixed blessings, including finance and health care....

The closest thing to a unified explanation for these problems is a mirror image of what made the 1930s so important. Then, the United States was vastly increasing its productive capacity, as Mr. Field argued in his recent book, “A Great Leap Forward.” Partly because the Depression was eliminating inefficiencies but mostly because of the emergence of new technologies, the economy was adding muscle and shedding fat. Those changes, combined with the vast industrialization for World War II, made possible the postwar boom....

There is no contemporary version of the 1870s railroads, the 1920s auto industry or even the 1990s Internet sector. Total economic output over the last decade, as measured by the gross domestic product, has grown more slowly than in any 10-year period during the 1950s, ’60s, ’70s, ’80s or ’90s....