If missing observations in a panel data set are not missing at random, many widely applied estimators may be inconsistent. In this paper the authors examine empirically several ways to reveal the nature and severity of the selectivity problem due to nonresponse, as well as a number of methods to...

The authors discuss several tests to check for the presence of selectivity bias in estimators based on panel data. One approach to test for selectivity bias is to specify the selection mechanism explicitly and estimate it jointly with the model of interest. Alternatively, one can derive the...

Frontmatter -- Preface -- Acknowledgments -- Contents -- Acronyms -- 1 Introduction -- 2 Linear static models -- 3 Dealing with heterogeneity and endogeneity: fixed effects, IV and GMM -- 4 Outliers, missing values and other data issues -- 5 Linear dynamic models -- 6 Models with limited...