“With or without the depression Wallace Carothers would have invented nylon.”
—Alexander J. Field, A Great Leap Forward
—Alexander J. Field, A Great Leap Forward
Field poses and attempts to answer interesting questions using straightforward number-crunching and reasoning, rather than resorting to obscure mathematics or advanced statistics. The result is a book that represents the best of what economics can be. I will attempt to sketch some of his key ideas in this essay, but I recommend the entire book to anyone with an interest in U.S. economic history, macroeconomics, or economic growth.
Field describes the last 90 years or so of economic history in terms of six eras: the Twenties, the Depression, World War II, the Golden Age, the Slowdown, and the Tech Boom. These are summarized in the following table.
Field devotes at least one chapter to each era. He chooses the endpoints for the eras as cyclical peaks. This reflects a presumption that there are two broad factors affecting productivity: a cyclical factor, which reflects the state of aggregate demand; and secular factors, which vary by era, that affect the supply side of the economy.
Nearly the entire book is concerned with interpreting the secular or supply-side factors. Only one chapter looks at cyclical patterns, where Field finds a positive relationship between productivity and the level of labor utilization. His hypothesis is that most firms are optimized for a high level of output, so that productivity falls when the economy slumps, due to lower utilization rates for fixed assets, such as warehouses and hotels.
One interesting question, particularly given the current slump, is whether downturns have permanent economic effects, for good or ill. Field concludes that the inventions and innovations that drive changes in the standard of living seem to be independent of cyclical forces. However, this answer is already so embedded in his basic assumptions that the issue can hardly be called decided.
