The literature that tests for U-shaped relationships using panel data, such as those between pollution and income or …

cross-sectional data as well as for panel data regressions with random effects. Penalized splines are particularly … assessment for the whole estimated functions. In this paper, we consider fixed effects panel data models instead of random … analyze the dynamics of life satisfaction over the life span based on data from the German Socio-Economic Panel (SOEP). An …

attributes and multidimensional unobserved heterogeneity with cross-section and panel data. We show that derivatives of choice … identification results to models with endogenous heterogeneity using either a control function or panel data. In time stationary … panel models with two periods, we find that differences over time of derivatives of choice probabilities identify utility …

This paper develops a nonparametric method to estimate a conditional quantile function for a panel data model with an …