Probabilities Class

The Probabilities class is an abstract class for computing probabilities in the discrete choice modeling framework. Given utilities $U$ , the Opus opus_core class mnl_probabilities computes multinomial logit probabilities:

$$P_{ni} = \frac{e^{U_{ni}}}{\sum_{j} e^{U_{nj}}}\,.$$

Thus, the method run() takes a 2-d array of utilities as an argument (number of agents $\times$ number of alternatives) and returns a 2-d array of probabilities (the same shape as utilities).