Olivier Blanchard is a prominent French economist known for his work in macroeconomics. He served as the chief economist at the International Monetary Fund (IMF) from 2008 to 2015, where he contributed to understanding global economic issues and policies. Blanchard has also published extensively on topics such as economic growth, unemployment, and fiscal policy. He is a professor at the Massachusetts Institute of Technology (MIT) and has authored several influential books and papers. Blanchard's research has significantly shaped modern economic thought, particularly in the areas of macroeconomic theory and policy analysis.