We develop a network model looking at the role of different types of peers in education. The empirical salience of the model is tested using a very detailed longitudinal dataset of adolescent friendship networks. We find that there are strong and persistent peer effects in education but peers...

While much of the literature on cross section dependence has focused mainly on estimation of the regression coefficients in the underlying model, estimation and inferences on the magnitude and strength of spill-overs and interactions has been largely ignored. At the same time, such inferences...

Despite their potentially strong impact on poverty, agricultural innovations are often adopted slowly. Using a unique household dataset on sunflower adoption in Mozambique, we analyse whether and how individual adoption decisions depend upon the choices of others in the same social networks....

This paper investigates the traits of the self-employed entrepreneurs in urban China, an economy rife with informational and institutional imperfections, under-developed financial markets, but a growing and important non-state sector. The self-employed make on average 20% more than...

We develop a theoretical framework that considers the role played by moral hazard and the diversity of networks and cultures in the choice of hiring channel. In favoritism contexts social networks, and particularly strong ties, are adopted as hiring channels for unskilled jobs and result in wage...

Voter education campaigns often aim to increase political participation and accountability. We followed a randomized campaign against electoral violence sponsored by an international NGO during the 2007 Nigerian elections. This paper investigates whether the effects of the campaign were...

Despite poor regional labour market conditions East Germans exhibit a rather limited willing-ness of leaving their home region. Applying an IV ordered probit approach and using the German Socio Economic Panel (SOEP), we test a local network explanation of lower spatial mobility. Firstly, we find...

There is growing evidence that face-to-face interaction is declining in many countries, exacerbating the phenomenon of social isolation. On the other hand, social interaction through online networking sites is steeply rising. To analyze these societal dynamics, we have built an evolutionary game...

We highlight that convergence in repeated averaging models commonly used to study cultural traits or opinion dynamics is not equivalent to convergence in Markov chain settings if transition matrices are time-varying. We then establish a new proof for the convergence of cultural traits in the...

This paper studies how the strength of social ties is affected by the geographical location of other individuals and their social capital. We characterize the equilibrium in terms of both social interactions and social capital. We show that lower travel costs increase not only the interaction...