The Trace Restriction: An Alternative Identification Strategy for the Bayesian Multinomial Probit Model
迹约束：贝叶斯多项 Probit 模型的替代识别策略
Previous authors have made Bayesian multinomial probit models identifiable by fixing a parameter on the main diagonal of the covariance matrix. The choice of which element one fixes can influence posterior predictions. Thus, we propose restricting the trace of the covariance matrix, which we achieve without computational penalty. This permits a prior that is symmetric to permutations of the nonbase outcome categories. We find in real and simulated consumer choice datasets…