TY - JOUR AU - Dafny,Leemore S. TI - Entry Deterrence in Hospital Procedure Markets: A Simple Model of Learning-By-Doing JF - National Bureau of Economic Research Working Paper Series VL - No. 9871 PY - 2003 Y2 - July 2003 UR - http://www.nber.org/papers/w9871 L1 - http://www.nber.org/papers/w9871.pdf N1 - Author contact info: Leemore Dafny Department of Management and Strategy Kellogg School of Management Northwestern University 2001 Sheridan Road Evanston, IL 60208-2001 Tel: 847/467-7511 Fax: 847/467-1777 E-Mail: l-dafny@kellogg.northwestern.edu AB - This paper examines the strategic behavior of hospitals in one of their primary output markets: inpatient surgical procedures. High levels of learning-by-doing in surgical fields may act as a barrier to entry. I investigate whether incumbent hospitals facing prospective entry in a procedure market manipulate their procedure volumes to produce such a barrier. I derive straightforward empirical tests from a model of patient demand, procedure quality, and differentiated product competition. Using hospital data on electrophysiological studies, an invasive cardiac procedure, I find evidence of entry-deterring investment in procedure volume. These findings suggest that competitive motivations may play a role in treatment decisions. ER -