Game theorists typically assume that changing a game's payoff levels - by adding the same constant to, or subtracting it from, all payoffs - should not affect behavior. While this invariance is an implication of the theory when payoffs mirror expected utilities, it is an empirical question when...

We study the problem of actively learning a non-parametric choice model based on consumers' decisions. We present a negative result showing that such choice models may not be identifiable. To overcome the identifiability problem, we introduce a directed acyclic graph (DAG) representation of the...