Francis Vella

Research Fellow

Georgetown University

Francis Vella received his PhD from the University of Rochester in 1990 and is currently the holder of the Villani Chair in the Economics Department at Georgetown University. His field of research is in the development and application of microeconometric methods.

He joined IZA as a Research Fellow in March 2004.



IZA Discussion Paper No. 11294

We consider identification and estimation of nonseparable sample selection models with censored selection rules. We employ a control function approach and discuss different objects of interest based on (1) local effects conditional on the control function, and (2) global effects obtained from integration over ranges of values of the control...

IZA Discussion Paper No. 10514

This paper examines the phenomenon of occupational hierarchies among immigrant labor groups in the United States. Using census data for 1940-2011 we document the persistent ranking of immigrant labor groups in major metropolitan areas reflected by their position in the empirical distribution of occupations based on the corresponding Duncan Socioeconomic...

IZA Discussion Paper No. 7651

This paper investigates the impact of income on an individual's subjective self-assessment of own health. We employ recently developed methods in the non linear panel data literature to account for the endogeneity of income and the presence of individual heterogeneity. We examine a panel data set of individuals living in...

IZA Discussion Paper No. 6008

This paper addresses the estimation of a semiparametric sample selection index model where both the selection rule and the outcome variable are binary. Since the marginal effects are often of primary interest and are difficult to recover in a semiparametric setting, we develop estimators for both the marginal effects and...

IZA Discussion Paper No. 4935
published in: Empirical Economics, 2013, 44 (1), 111-133

An innovation which bypasses the need for instruments when estimating endogenous treatment effects is identification via conditional second moments. The most general of these approaches is Klein and Vella (2010) which models the conditional variances semiparametrically. While this is attractive, as identification is not reliant on parametric assumptions for variances,...

IZA Discussion Paper No. 3967
published in: Oxford Bulletin of Economics and Statistics, 2012, 74 (5), 676–690

This paper investigates the degree of intergenerational transmission of education for individuals from the National Longitudinal Survey of Youth 1979. Rather than identifying the causal effect of parental education via instrumental variables we exploit the feature of the transmission mechanism responsible for its endogeneity. More explicitly, we assume the intergenerational...

IZA Discussion Paper No. 3369

Do workers sort more randomly across different job types when jobs are harder to find? To answer this question, we study the mobility of male workers among three-digit occupations in the matched files of the monthly Current Population Survey over the 1979-2004 period. We clean individual occupational transitions using the...

IZA Discussion Paper No. 3257
published in: Review of Economics and Statistics, 2011, 93 (3), 764 - 774

We use panel data from the US Health and Retirement Study 1992-2002 to estimate the effect of self-assessed health limitations on active labor market participation of men around retirement age. Self-assessments of health and functioning typically introduce an endogeneity bias when studying the effects of health on labor market participation....

IZA Discussion Paper No. 3217

This paper employs United States Census data to study the occupational allocation of immigrants. The data reveal that the occupational shares of various ethnic groups have grown drastically in regional labor markets over the period 1980 to 2000. We examine the extent to which this growth can be attributed to...

IZA Discussion Paper No. 2802
published in: Economica, 2013, 80 (318), 219-247

Using a sample of mother-child pairs from the National Longitudinal Survey of Youth 1979 (NLSY79) and the Young Adults of the NLSY79 we explore the relationship between a woman’s attitudes towards the role of females in the labor market and the attitudes of her children. We also examine whether this...