The "Court Predictor" model as estimated for 1982-92 requires the following parameters entered as discussed below.

• HHI - Herfindahl index that proxies competitive structure of the market. It ranges from almost 0 for a perfectly competitive market to 10,000 for monopoly. To define a Herfindahl, the court will first construct a relevant market (including both product and geographic specifications) and then compute the market shares of the incumbent firms.

• Barriers - barriers should be considered strong when it is obvious that the court will find entry impeded. If entry is expected to be easy input 0. Insight on this issue can be derived from the filings of the litigants and the trial testimony. In some cases, the parties may effectively stipulate that entry is impeded.

• Conditions - The Conditions variable proxies the overall strength of the case. If market conditions are suggestive of collusion or unilateral effects use a number of 1 or over depending on the strength of the evidence, while if efficiencies and buyer power are likely court findings use -2. As the evidence supporting an injunction becomes weaker, use a more negative number. The input data range between -6 and 6, although a significant majority of the observations are between -2 and 2.

The user can compute approximate probabilities. (The software numerically integrates the normal function and thus the probabilities are not exact)