Please use this identifier to cite or link to this item: https://hdl.handle.net/10419/38708 
Year of Publication: 
2008
Series/Report no.: 
CSIO Working Paper No. 0099
Publisher: 
Northwestern University, Center for the Study of Industrial Organization (CSIO), Evanston, IL
Abstract: 
We analyze the optimal dynamic policy of an antitrust authority towards horizontal mergers when merger proposals are endogenous and occur over time. Approving a currently proposed merger will affect the profitability and welfare effects of potential future mergers, the characteristics of which may not yet be known to the antitrust authority. We show that, in many cases, this apparently difficult problem has a simple resolution: an antitrust authority can maximize discounted consumer surplus by using a completely myopic merger review policy that approves a merger today if and only if it does not lower consumer surplus given the current market structure.
Document Type: 
Working Paper

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