Cengiz Haksever

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Using a national data base of urban hospitals, the effect of ownership (government, nonprofit, and for-profit) on the technical efficiency of hospitals was examined. Efficiency scores were computed using a method called data envelopment analysis. Controlling for environmental and hospital characteristics, for-profit hospitals were found somewhat less(More)
I examine the short and long term stock price performance of firms which acquire, sell, abandon, or involuntarily repossess technology rights. I find significant announcement-period abnormal returns, which are positive to the acquirers and sellers and negative to the abandoners and repossessors, without any robust post-announcement long term abnormal(More)
Computer implementation of an effective approach for the solution of non-linear, non-convex ratio goals problem is presented. The approach uses Charnes and Cooper’s [ 1 l] linearization method of solution of ratio goals problem with a sequence of perturbed linear programming (LP) problems. For efficient solution, it incorporates the Opposite Sign Algorithm(More)
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