The WFI-Calculator™ (online version)



This software calculates the Werden-Froeb-index (WFI) for full mergers between firms that compete on prices (Bertrand competition). Required inputs are (current) sales volumes, unit prices, and the own- and cross-price-elasticities of those commodities involved in the merger.

For details on the WFI - including its definition if competition is in quantities (Cournot) and/or mergers are partial - and its use in merger control, see:

Goppelsroeder, M., M.P. Schinkel and J. Tuinstra, "Quantifying the Scope for Efficiency Defense in Merger Control: The Werden-Froeb-Index," Amsterdam Center for Law & Economics Working Paper, No.2006-10




© Marie Goppelsroeder, Maarten Pieter Schinkel, Jan Tuinstra and Eelko Ubels, 2006. All rights reserved.

Disclaimer:

This software is being provided by the copyright holders under the following license. By obtaining and/or using this software, you (the licensee) agree that you have read, understood, and will comply with the following terms and conditions.

This software is an online trial version, not intended for commercial use. Permission to use this software for any purpose and without fee or royalty is hereby granted. No permission is granted to copy, modify, and distribute this software and its documentation.

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A stand alone full-version of this software, with additional functionality such as data storage, is available on request from the authors. For inquiries, contact ACLE, Roetersstraat 11, 1018WB Amsterdam, The Netherlands, or email: acle@uva.nl.