Villani, Mattias; Kohn, Robert; Giordani, Paolo - In: Journal of Econometrics 153 (2009) 2, pp. 155-173
We model a regression density flexibly so that at each value of the covariates the density is a mixture of normals with the means, variances and mixture probabilities of the components changing smoothly as a function of the covariates. The model extends the existing models in two important ways....