"One of the most difficult problems in the social sciences is measuring the policy climate in societies. Prior to the 1930s the vast majority of labor regulations in the U.S. were enacted at the state level. In this paper we develop several summary measures of labor regulation that document the...

"This paper proposes a new test of the Protection for Sale (PFS) model by Grossman and Helpman (1994). Unlike existing methods in the literature, our approach does not require any data on political organizations. We formally show that the PFS model predicts that the quantile regression of the...