TY - JOUR
AU1 - Helpman, Elhanan
AU2 - 
TI - Innovation, Imitation, and Intellectual Property Rights
DO - 10.3386/w4081
DA - 1992-05-01
UR - https://www.deepdyve.com/lp/unpaywall/innovation-imitation-and-intellectual-property-rights-HCfOIBKX4g
DP - DeepDyve
ER -