The models in this directory express complementarity problems mentioned in the test results (or examples) shown in Michael C. Ferris, Robert Fourer, and David M. Gay, "Expressing Complementarity Problems in an Algebraic Modeling Language and Communicating Them to Solvers", forthcoming report. Most of the models in this directory started out as GAMS models in MCPLIB, ftp://ftp.cs.wisc.edu/math-prog/mcplib . Papers describing these models and other possible complementarity models are: Steven P. Dirkse and Michael C. Ferris, "MCPLIB: A Collection of Nonlinear Mixed Complementarity Problem", Optimization Methods and Software 5 (1995), pp. 319-345. ftp://ftp.cs.wisc.edu/tech-reports/reports/94/tr1215.ps.Z M. C. Ferris and J. S. Pang, "Engineering and Economic Applications of Complementarity Problems", SIAM Review 39 (1997), pp. 669-713. http://www.siam.org/journals/sirev/39-4/28596.html runall is an AMPL script that exercises most of the models.