David Edward Card (born 1956) is a Canadian-American labour economist and professor of economics at the University of California, Berkeley. He was awarded half of the 2021 Nobel Memorial Prize in Economic Sciences "for his empirical contributions to labour economics", with Joshua Angrist and Guido Imbens jointly awarded the other half. Early life and career David Card was born in Guelph, Ontario, in 1956. His parents were dairy farmers. Card earned his Bachelor of Arts degree from Queen's University in 1978 and his Ph.D. degree in economics in 1983 from Princeton University, after completing a doctoral dissertation titled "Indexation in long term labor contracts" under the supervision of Orley Ashenfelter. Card began his career at the University of Chicago Graduate School of Business, where he was Assistant Professor of Business Economics for 2 years. He was on the faculty at Princeton University from 1983 to 1997, before moving to Berkeley; from 1990 to 1991 he served as a visiting professor at Columbia University. From 1988 to 1992, Card was Associate Editor of the Journal of Labor Economics and from 1993 to 1997, he was co-editor of Econometrica. From 2002 to 2005, he was co-editor of The American Economic Review. Academic work In the early 1990s, Card received much attention for his finding, together with his then Princeton University colleague Alan B. Krueger that, contrary to widely accepted beliefs among economists, the minimum wage increase in New Jersey did not result in job reduction of fast food companies in that state. While the methodology (see difference in differences) and its claim have been disputed (see minimum wage for discussion), later studies of minimum wage increases have tended to confirm Card and Krueger's findings, and many economists, including Joseph Stiglitz and Paul Krugman, accept these findings. David Card has also made contributions to research on immigration, education, job training and inequality. Much of Card's work centers on a comparison between the United States and Canada in various situations. On immigration, Card's research has shown that the economic impact of new immigrants is minimal. Card has done several case studies on the rapid assimilation of immigrant groups, finding that they have little or no impact on wages. For example, Card studied the economic impacts of the Mariel boatlift, and compared the economic effects in Miami to those in Atlanta, Houston, Los Angeles and Tampa, which receive fewer Cuban immigrants. Card found that despite