Before revision:  I propose a nonparametric model that explicitly accounts for latent choice sets in the care setting enrollment decision . In this model, I study various parameters that evaluate Head Start in terms of policies that mandate enrollment and also those that allow voluntary enrollment into Head Start. I show that the identified set for these parameters given the information provided by the study and by various institutional details of the setting can be constructed using a linear programming method.
After revision:  I propose a nonparametric model that explicitly accounts for latent choice sets to relate where access was received to the treatment assignment status, participation decision and outcome, and a linear programming procedure to compute the identified set for these parameters given the information provided by the study and by various institutional details of the setting can be constructed using a linear programming method.