In this article we estimate the long-run aggregate elasticity of substitution between skilled and unskilled workers. This is an important parameter as it allows us to compute the skill biased technological progress (SBTP) from the evolution of relative wages. However, it is hard to estimate...

A new dataset by Bazzi and Blattman (2014) allows examining the effects of international commodity prices on the risk of civil war outbreak with more comprehensive data. I find that international commodity price downturns sparked civil wars in Sub-Saharan Africa. Another finding with the new...

I examine whether transitory events can tip the scales against authoritarian regimes and lead to persistent democratization. I think of situations where this is a possibility as democratic tipping points. The transitory events I focus on are rainfall shocks in the most agricultural countries in...

According to Gibrat’s law for cities, population shocks have permanent effects on city size. I examine this implication by analysing the persistence of observed population shocks: German military casualties in WWI by municipality of birth. I find a strong negative effect of military casualties...

After the end of World War II in 1945, millions of refugees arrived in what in 1949 became the Federal Republic of Germany. We examine their effect on today’s productivity, wages, income, rents, education, and population density at the municipality level. Our identification strategy is based...

After the end of World War II in 1945, millions of refugees arrived in what in 1949 became the Federal Republic of Germany. We examine their effect on today’s productivity, wages, income, rents, education, and population density at the municipality level. Our identification strategy is based...

According to Gibrat’s law for cities, population shocks have permanent effects on city size. I examine this implication by analysing the persistence of observed population shocks: German military casualties in WWI by municipality of birth. I find a strong negative effect of military casualties...

In this study we analyze whether the gender composition of siblings within a family affects the choice of College Major. The question is whether a family environment that is more gender-homogeneous encourages academic choices that are less gender stereotyped. We use the last name and the exact...

In an interesting and influential paper Robert Lucas (1993) considering the experience of East Asian small economies, suggests that 'on the job' learning could be the principal engine of their miraculous growth in the last 20 years. In this paper I develop an overlapping generation model where...

The importance of innovation for the economic performance of industrialized countries has been largely stressed recently by the theoretical and empirical literature. Moreover the intensity of knowledge externalities in generating innovation, is the key parameter in determining sustained growth...