Economic recessions are typically described as short-term periods of negative economic growth. According to the traditional business cycle view, output moves up and down around its long-term upward trend and after a recession, it recovers to its pre-recession trend. Our new study casts doubt on this traditional view and shows that all types of recessions—including those arising from external shocks and small domestic macroeconomic policy mistakes—lead to permanent losses in output and welfare.
Nearly a decade after the global financial crisis erupted into the Great Recession, the global economy finally appears to be on the verge of strong growth . Until recently, however, economic growth fell below forecasts of a vigorous rebound, as predicted by supporters of the traditional business cycle theory.
Some researchers have explained the sluggish post-crisis growth as driven by demographic trends or other factors specific to the United States. But such explanation ignores the fact that output dynamics after the crisis followed a similar pattern seen in other countries.
In a 2008 paper , we had shown for a sample of 190 countries that financial and political crises have permanent long-run economic costs in terms of output forgone. On average, the magnitude of the persistent loss in output is about 5 percent for balance of payments crises, 10 percent for banking crises, and 15 percent for twin crises.
Using updated data from 1974 to 2012, we confirm our earlier findings that the irreparable damage to output is not limited to financial and political crises. All types of recessions, on average, lead to permanent output losses. Contrary to conventional wisdom, we also show that countries do nottypically have growth booms before crises and recessions.
Challenging the traditional view
In the traditional view of the business cycle, a recession consists of a temporary decline in output below its trend line, but a fast rebound of output back to its initial upward trend line during the recovery phase (see chart, top panel). In contrast, our evidence suggests that a recovery consists only of a return of growth to its long-term expansion rate—without a high-growth rebound back to the initial trend (see chart, bottom panel). In other words, recessions can cause permanent economic scarring.
These economic scars from recessions and crises also have dramatic long-term consequences. According to traditional theory, poor countries should catch up to income levels of rich countries (see dotted lines in chart below) because they should have a bigger bang for each buck of investment. But the historical evidence contradicts this theory. Instead, poor countries’ incomes have fallen further behind. Our new model explains a key reason why. Poor countries suffer deeper and more frequent recessions and crises, each time suffering permanent output losses and losing ground (solid lines in chart below).