All of these models were built using Microsoft Excel, and have been tested using the 2007, 2003 and 2002 releases (for Windows). They should also be compatible with earlier/later releases, but this hasn't been verified. Most of the models should also work in Excel 2008 for Mac. To use the models you will need to have a licensed copy of Excel installed. For some of the general equilibrium models you will need to have the Solver add-in installed (click here to view instructions). For others, macros must also be enabled for full functionality (click here to view instructions), although it is possible to use the models without enabling macros for most purposes (in the same way as the other Solver models). Macro functionality is not available on the Mac. 'Live' general equilibrium models and all partial equilibrium models do not require any special add-ins or macros.
Each Excel model is available from the download link on its description page. The models are arranged in the order that they would be encountered in a typical field course on international trade, starting with the positive theory of trade and then shifting to the theory of commercial policy. A topic index indicates suggested exercises and includes a listing by model. All the models have been been built with very similar interfaces, and they all work in a similar way. To use a model:
More details can be found in the pages for each model, which also contain a graphical guide to the model components. Each page also suggests a series of topics that can be explored with the model, and in some cases sample assignments. The illustrated guides and sample exercises are replicated within each Excel sheet for easy access. If you are interested in how the models are built, a couple of simple examples that illustrate the principles involved can be found here. If you have further queries, please contact the authors.