This study provides an alternative approach that takes account of the unobserved effects of each seller under a sample selection framework. Empirical findings, after converting the Yahoo! Japan Auctions dataset into unbalanced panel data, show that seller reputation remains an important factor...

This paper considers nonparametric identification of nonlinear dynamic models for panel data with unobserved covariates. Including such unobserved covariates may control for both the individual-specific unobserved heterogeneity and the endogeneity of the explanatory variables. Without specifying...