各位大侠，救助文献一篇。谢谢您！
International Journal of Industrial Organization
  Volume 8, Issue 1, 1990, Pages 93-113  

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doi:10.1016/0167-7187(89)90036-2 | How to Cite or Link Using DOI

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Kyle Bagwell, Garey Ramey

Northwestern University, Eranston, IL 60208, USA

University of California, San Diego, La Jolla, CA 92093, USA