This article provides empirical researchers with an introduction and guide to research designs based on variation in judge and examiner tendencies to administer treatments or other interventions. We review the basic theory behind the research design, outline the assumptions under which the...

In contrast to Robert Mundell's Optimum Currency Area theory and his recommendation of forming a monetary union, the economic fundamentals of Euro area member countries have not harmonized. The opposite holds: the Euro core countries - most of all Germany, but also the Netherlands and Finland -...

This paper estimates the effect of social connectedness on crime across U.S. cities from 1970 to 2009. Migration networks among African Americans from the South generated variation across destinations in the concentration of migrants from the same birth town. Using this novel source of...

This paper examines the long-run effects of the 1980-1982 recession on education and income. Using confidential Census data, I estimate difference-in-differences regressions that exploit variation across counties in recession severity and across cohorts in age at the time of the recession. For...

This paper studies how U.S. local labor markets respond to employment losses that occur during recessions. Following recessions from 1973 through 2009, we find that areas that lose more jobs during the recession experience persistent relative declines in employment and population. Most...

This paper studies how birth town migration networks affected long-run location decisions during historical U.S. migration episodes. We develop a new method to estimate the strength of migration networks for each receiving and sending location. Our estimates imply that when one randomly chosen...

In contrast to Robert Mundell's Optimum Currency Area theory and his recommendation of forming a monetary union, the economic fundamentals of Euro area member countries have not harmonized. The opposite holds: the Euro core countries - most of all Germany, but also the Netherlands and Finland -...

We examine individual stock sales from 2008 to 2009 using population tax return data. The share of sales by the top 0.1 percent of income recipients and other top income groups rose sharply following the Lehman Brothers bankruptcy and remained elevated throughout the financial crisis. Sales by...