Hans-Werner Sinn (born March 7, 1948 in Brake, Westphalia) is a German economist and President of the Ifo Institute for Economic Research.
After studying economics at the University of Münster from 1967 to 1972 and receiving his doctorate from the University of Mannheim in 1978, Sinn was awarded the venia legendi in 1993, also from the University of Mannheim.
Since 1984 Sinn has been full professor in the faculty of economics at the University of Munich (LMU), first holding the chair for economics and insurance, and from 1994 the chair for economics and public finance. During leaves of absence from Mannheim and Munich he held visiting professorships (1978/79 and 1984/85) at the University of Western Ontario in Canada. During sabbaticals he was also visiting researcher at the London School of Economics, as well as at Bergen, Stanford, Princeton and Jerusalem Universities. Since 1988 he has been honorary professor of the University of Vienna, where he has held many lectures. Since 1 February 1999 Sinn has been president of the Ifo Institute for Economic Research. In 2006 he became president of the International Institute of Public Finance. From 1997 to 2000 Sinn headed the Verein für Sozialpolitik, the association of German-speaking economists.