This paper examines the relationship between individuals' skills and labor market outcomes for the working-age population of Colombia's urban areas. Using a 2012 unique household survey, the paper finds that cognitive skills (aptitudes to perform mental tasks such as comprehension or reasoning)...

Bivariate duration data frequently arise in economics, biostatistics and other areas. In bivariate frailty models, dependence between the frailties (i.e., unobserved determinants) induces dependence between the durations. Using notions of quadrant dependence, we study restrictions that this...

We study the determinants and longitudinal evolution of nine types of adolescent (verbal, physical, indirect) bullying at school and domestically using the Understanding Society dataset during 2009-13. Family support is the most prominent protective factor against bullying. Applying joint...

We investigate the impact of nine types of adolescent (verbal, physical, indirect) school/domestic bullying on life satisfaction, and two mental health outcomes (emotional symptoms and hyperactivity/inattention) using the Understanding Society dataset during 2009-13. Bullying significantly...

We propose a novel procedure, built within a Generalized Method of Moments framework, which exploits unpaired observations (singletons) to increase the efficiency of longitudinal fixed effect estimates. The approach allows increasing estimation efficiency, while properly tackling the bias due to...

Using real effort to implement costly activities increases the likelihood that the motivations that drive effort provision in real life carry over to the laboratory. However, unobserved differences between subjects in the cost of real effort make quantitative prediction problematic. In this...