Now showing items 1-3 of 3

    • Thumbnail

      Finite sample behavior of two step estimators in selection models 

      Fernández Sainz, Ana Isabel; Rodríguez Poo, Juan M.; Villanúa Martín, Inmaculada (1999-04)
      The problem of specification errors in sample selection models has received considerable attention both theoretically and empirically. However, very few is known about the finite sample behavior of two step estimators. In ...
    • Thumbnail

      Nonparametric estimation of time varying parameters under shape restrictions 

      Orbe Mandaluniz, Susan; Ferreira García, María Eva; Rodríguez Poo, Juan M. (2001-01)
      In this paper we propose a new method to estimate nonparametrically a time varying parameter model when some qualitative information from outside data (e.g. seasonality) is available. In this framework we make two main ...
    • Thumbnail

      Two-Stage Nonparametric Regression for Longitudinal Data 

      Ferreira García, María Eva; Núñez Antón, Vicente Alfredo; Rodríguez Poo, Juan M. (1999-01)
      In the analysis of longitudinal data it is of main interest to investigate the existence of group and individual effects under correlated observations across time. In this paper, we develop a nonparametric two-step procedure ...