On the Distribution of Order Types

Abstract Goodman and Pollack have asked to estimate the probabilities of order types by using a uniformly distributed random generator on the unit interval. We provide solutions to this question, and we apply these methods for estimating the probability for various combinatorial types of polytopes with up to 8 points in dimension 3. Our investigation also confirms a classification result in oriented matroid theory (Bokowski and Richter-Gebert).