copyright Luke Froeb, 1996-2001, mail, vitae. This code may be used and distributed but may not be sold without written permission from the author.

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- SimMerger™ Lite is a Mathematica 3.0 Notebook.
This is a "lite" version of software written for the Department of Justice to
simulate the effects of mergers with Logit, AIDS (Almost Ideal Demand System), Linear, and
Constant Elasticity Demand Curves. It is quite flexible and allows one to simulate
all kinds of different scenarios using these four demand curves. It differs from the
Department of Justice version of SimMerger™, in that it does not permit nests in the
logit demand specification, and it does not permit income effects in the AIDS model.
Instead it uses a "flat" logit specification and what we call a SAIDS, or
Simplified AIDS model. Copyright Crooke, Froeb, & Tschantz, 1998. (See the
Froeb, Crooke, Tschantz & Werden, 1998 paper for reference).
- Training Exercises for Merger Simulation
- Exercise 1.0, and answers. [1 product, Comp.-->Monopoly]
- Exercise 1.1, and answers. [Use SimMerger to do 1.0]
- Exercise 2.0, and answers. [Various demand curves, 3-->2 merger]
- Exercise 2.1, and answers. [Use SimMerger to do 2.0]
- Exercise 3.0, and answers. [Compensating MC reductions, 3-->2 merger]
- Exercise 3.1, and answers. [Use SimMerger to do 3.0]

- Training Exercises for Merger Simulation
- Merger.m is a Mathematica 2.2 "package" of
subroutines from. It is "called" by the following the notebook, simple.ma. This is the code that appeared in Hal
Varian's
*Computational Economics with Mathematica*book.- simple.ma is a Mathematica 2.2 notebook that demonstrates the "top level" programs for simulating the effects of mergers using Logit and nested Logit Demand curves. It "calls" the merger package above.

- ML is a Mathematica 3.0 notebook and package. This is a set of maximum likelihood estimation routines with a collection of examples, including a multivariate logit with changing choice set..
- Logit.ma, is a Mathematica 2.2 notebook, written by Hal Varian, demonstrating maximum likelihood estimation of a two choice logit model from individual data on choices.

- Froeb, Luke, Steven Tschantz, Philip Crooke, and Gregory Werden "The Effects of Assumed Demand Form on Simulated Post Merger Equilibria," Owen Working paper (1997).
- Werden, Gregory, and Luke Froeb, "The Entry-Inducing Effects of Horizontal
Mergers,"
*Journal of Industrial Economics*, forthcoming. - Froeb, Luke, Gregory Werden, and Timothy Tardiff, "The Demsetz Postulate and the
Effects of Mergers in Differentiated Products Industries,"
*Economic Inputs, Legal Outputs: The Role of Economists in Modern Antitrust*, London: John Wiley & Sons, edited by Fred McChesney, 1998. - G. Werden & L. Froeb, "The Effects of Mergers in Differentiated Products Industries: Structural Merger Policy and the Logit Model," Journal of Law, Economics, & Organization, 10 (1994) pp. 407-426.
- L. Froeb, and G. Werden, "Simulating Mergers among Noncooperative Oligopolists," in Computational Economics and Finance: Modeling and Analysis with Mathematica, vol. 2, edited by Hal Varian ( TELOS, Springer-Verlag) 1996.
- G. Werden & L. Froeb, "Simulation as an Alternative to Structural Merger Policy
in Differentiated Products Industries," invited chapter in
*The Economics of the Antitrust Process*, edited by Malcolm Coate and Andrew Kleit, (forthcoming). - G. Werden, L. Froeb, and T. Tardiff, "The Use of the Logit Model in Applied Industrial Organization," International Journal of the Economics of Business, vol. 3, no. 1, (1996) pp. 85-107.