This paper estimates the link between population density and COVID-19 spread and severity in the contiguous United States. To overcome confounding factors, we use two Instrumental Variable (IV) strategies that exploit geological features and historical populations to induce exogenous variation...

We analyze the first data set on consistently defined functional urban areas in Europe and compare the European to the US urban system. City sizes in Europe do not follow a power law: the largest cities are "too small" to follow Zipf's law

Throughout the imperial era, defensive walls surrounded Chinese cities. Although most city walls have vanished, the cities have survived. We analyze a sample of nearly 300 prefectural-level cities in China, among which about half historically had city walls. We document that cities that had...

This paper provides descriptive evidence about the distribution of wages and skills in denser and less dense employment areas in France. We confirm that on average, workers in denser areas are more skilled. There is also strong over-representation of workers with particularly high and low skills...

This paper studies the impact of the COVID-19 pandemic on the gendered dimensions of employment and mental health among urban informal-sector workers in India. First, we find that men's employment declined by 84 percentage points during pandemic relative to pre-pandemic employment, while their...

This paper is concerned with patterns of expenditure and child welfare among female headed (FHH) and male headed households (MHH) in Tanzania as well as with the underlying cause of potentially different patterns. I estimate semiparametric Engel curves to investigate household expenditure...

This paper explores how cross-sectional data can be exploited jointly with longitudinal data, in order to increase estimation efficiency while properly tackling the potential bias due to unobserved individual characteristics. We propose an innovative procedure and we show its implementation by...

This paper examines the importance of relative deprivation in Tanzania, a poor African country, using three waves of the Tanzanian National Panel Survey. We contribute to earlier literature in Africa by controlling for time persistent unobservable individual characteristics (panel data) and by...

Using newly available data, we re-evaluate the impact of transition from plan to market in former communist countries on objective and subjective well-being. We find clear evidence of the high social cost of early transition reforms: cohorts born around the start of transition are shorter than...

While economic deprivation is an important determinant of civil conflict, it cannot completely explain the incentives for warfare. In irregular wars, for example, both incumbents and insurgents may employ various tactics to win the hearts and minds of civilians in order to muster territorial...