TY - JOUR AU - Segal,Ilya AU - Whinston,Michael TI - Antitrust in Innovative Industries JF - National Bureau of Economic Research Working Paper Series VL - No. 11525 PY - 2005 Y2 - August 2005 UR - http://www.nber.org/papers/w11525 L1 - http://www.nber.org/papers/w11525.pdf N1 - Author contact info: Ilya Segal Stanford University Department of Economics Stanford, CA 94305-6072 E-Mail: ilya.segal@stanford.edu Michael D. Whinston Department of Economics Northwestern University 2003 Sheridan Road Evanston, IL 60202 Tel: 847/491-8260 Fax: 847/491-7001 E-Mail: mwhinston@northwestern.edu M2 - featured in NBER digest on 2005-08-01 AB - We study the effects of antitrust policy in industries with continual innovation. A more protective antitrust policy may have conflicting effects on innovation incentives, raising the profits of new entrants, but lowering those of continuing incumbents. We show that the direction of the net effect can be determined by analyzing shifts in innovation benefit and supply holding the innovation rate fixed. We apply this framework to analyze several specific antitrust policies. We show that in some cases, holding the innovation rate fixed, as suggested by our comparative statics results, the tension does not arise and a more protective policy necessarily raises the rate of innovation. ER -