“For so it is, oh my Lord God, I measure it, but what it is that I measure I do not know.” –St. Augustine
Gross Domestic Product (GDP) gets a lot of attention these days. It’s fair game for bloggers, talking heads, perhaps your local barber. While most agree that higher GDP is better than lower, there are problems, some better-known than others. Some theorists have considered the concept hopeless, such as Austrian economist Oskar Morgenstern, who called GNP (the predecessor to GDP) “primitive in the extreme and certainly useless.” Lamenting the idea that the whole of a nation’s economic activity could be captured in a single number, he said that “very few men, even few economists, or should I say regretfully, especially economists, have a real appreciation and understanding of the immense complexity of an economic system.”
Let’s get the formal definition out of the way. GDP is the market value of all final goods and services produced in a particular country in a given year. The federal Bureau of Economic Analysis computes this number and releases it quarterly. The level of GDP is used as a basis for evaluating other things, like the national debt, which currently stands at about 85 percent of one year’s GDP in the United States. GDP growth rates are closely followed. These are inflation-adjusted, seasonally adjusted, and annualized, and are of course supposed to tell us how well the economy is doing.
Simon Kuznets gets credit for the first serious attempt to calculate national income figures, publishing his first work on the subject in 1941. Following in his footsteps, calculation of GDP and other “national income accounts” has become a core area of the economics profession. The explosion of economic and financial news has thrust GDP into the limelight in recent years. Continue reading