This paper tests empirically the credit-constraints thesis by using cross-country data on secondary and higher-education enrolment rates. Contrary to some previous works in this direction, we find several pieces of evidence that support the importance of such a thesis. First, controlling for the...

Low college enrollment rates among low income students may stem from credit constraints, low academic skill, low quality schools, or some combination of these. Recent Massachusetts data allow the first use of school district fixed effects in the analysis of credit constraints, leading to four...

We study optimal linear income taxation in a model with heterogeneous agents where earnings potentials are endogenously determined through human capital accumulation. Agents differ in initial conditions and ability to learn. Capital market imperfections prevent poor agents to invest optimally in...