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dc.contributor.authorMora, Jhon James
dc.contributor.authorMuro Romero, Juan de Dios
dc.identifier.bibliographicCitationBorradores de Economía y Finanzas, Marzo 2007, n. 10, p. 1-26. ISSN 1900-1568,es_ES
dc.description.abstractSample selection bias is commonly used in economic models based on micro data. Despite the continuous generalization of panel data surveys, most countries still collect microeconomic information on the behavior of economic agents by means of repeated independent and representative cross-sections. This paper discusses a simple testing procedure for sample selection bias in pseudo panels. In the context of conditional mean independence panel data models we describe a pseudo panel model in which under convenient expansion of the original specification with a selectivity bias correction term the method allows us to use a Wald test of H0: as a test of the null hypothesis of absence of sample selection bias. We show that the proposed selection bias correction term is proportional to Inverse Mills ratio with an argument equal to the normit of a consistent estimation of the observed proportion of individuals in each cohort. This finding can be considered a cohort counterpart of Heckmans selectivity bias correction for the individual case and generalizes to some extent previous existing results in the empirical labour literature. Monte Carlo analysis shows the test does not reject the null for fixed T at a 5% significance level in finite samples and increases its power when utilizing cohort size corrections as suggested by Deaton (1985). As a side effect, our method enables us to make a consistent estimation of the pseudo panel parameters under rejection of the nullen
dc.publisherUniversidad de ICESI. Departamento de Economíaes_ES
dc.subjectRepeated Cross-section Modelsen
dc.subjectPseudo Panelsen
dc.subjectSelectivity Bias Testingen
dc.subjectDiscrete Analysis with Grouped Dataen
dc.subjectMonte Carlo Methodsen
dc.subjectMétodo de Monte Carloes_ES
dc.subjectAnálisis discretoes_ES
dc.subjectPrueba de selectividad diagonales_ES
dc.subjectModelos repetitivos de sección transversales_ES
dc.titleTesting for sample selection in pseudo panels : theory and Monte Carloen
dc.subject.ecienciaCIENCIAS ECONÓMICASes_ES
dc.contributor.affiliationUniversidad de Alcalá. Departamento de Estadística, Estructura Económica y Organización Económica Internacionales_ES

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