In this study, we investigate whether and to what extent community managers in online collaborative communities can stimulate crowd activities through their engagement. Using a novel data set of 22 large online idea crowdsourcing campaigns, we find that active engagement of community managers...

We examine peer effects in welfare use among immigrants to Sweden by exploiting a governmental refugee placement policy. We distinguish between the quantity of contacts the number of individuals of the same ethnicityand the quality of contacts welfare use among members of the ethnic group. OLS...

The energy transition increases the demand for minerals from ethnically diverse, conflict-prone developing countries. We study whether and where mining is possible in such countries without raising the risk of civil conflict. We proceed in three steps: First, we propose a theoretical model to...

I exploit the 1986 Immigration Reform and Control Act (IRCA), which legalized millions of Hispanic migrants in the USA, to study the impact of immigrant legalization on schooling outcomes. Although undocumented migrants are entitled to public education, I find significant post-legalization...

In this paper, we study how forced migration impacts the in-group and out-group social capital of Syrian refugees and the host population in Northern Lebanon by administering a novel survey experiment in which we manipulate the salience of the migration experience (for refugees) and the refugee...

Both in the UK and in the US, we observe puzzling gender asymmetries in the propensity to outmarry: Black men are more likely to have white spouses than Black women, but the opposite is true for Chinese: Chinese men are half less likely to be married to a White person than Chinese women. We...

Objectives: To estimate racial/ethnic and education-related disparities and examine trends in uncontrolled cardiovascular (CVD) risk factors among adults with diabetes. Methods: The analysis samples include adults aged 20 and over from NHANES III, 1988- 1994 and NHANES 1999-2008 who self-report...

This paper examines the effects that windfalls from international commodity price booms have on net foreign assets in a panel of 145 countries during the period 1970-2007. The main finding is that windfalls from international commodity price booms lead to a significant increase in net foreign...

By the 2008/09 school year the federal state of North Rhine-Westphalia (Germany) abolished binding school catchment areas (SCAs) in all municipalities. The reform has been controversial and it was feared that school choice would increase ethnic segregation. Using data on all primary schools, we...

Recently collected data show that, within any manufacturing industry, vertically integrated firms tend to have larger, higher productivity plants, account for the bulk of sales, and also sell externally most of the inputs they produce. In a weak contracting environment characteristic of...