TY - JOUR AU - Hart,Oliver AU - Tirole,Jean TI - Vertical Integration and Market Foreclosure JF - National Bureau of Economic Research Reprint Series VL - No. 1517 PY - 1991 Y2 - February 1991 UR - http://www.nber.org/papers/r1517 N1 - Author contact info: Oliver D. Hart Department of Economics Littauer Center 220 Harvard University Cambridge, MA 02138 Tel: 617/496-3461 Fax: 617-495-7730 E-Mail: ohart@harvard.edu Jean Tirole Institut d'Economie Industrielle Bureau MF529 - Bat. F 21 allees de Brienne 31000 Toulouse FRANCE Tel: 33-561-128642 E-Mail: tirole@cict.fr AB - ER -