In this chapter, we provide an overview of research on neighborhoods and social networks and their role in shaping … social networks in crime, education, and labor-market outcomes. In particular, we discuss in detail identification problems …

In order to understand the different characteristics observed in real-world networks, one needs to analyze how and why … networks form, the impact of network structure on agents' outcomes, and the evolution of networks over time. For this purpose … real-world networks. We also find that there exists a sharp transition in efficiency and network density from highly …

transition from dissortative to assortative networks. This effect can shed light on the distinction between technological and … social networks as it gives a simple mechanism explaining how and why this transition occurs. …

chapter, I investigate the extent to which economic models of segregation, information-based discrimination, peer dynamics … consistent with the time-series data. Segregation and models of discrimination both contradict the trends in important ways. …

To better understand the way social networks operate in the labor market, we propose two simple models where … strength of weak ties in finding a job because they involve a secondary ring of acquaintances who have contacts with networks …

probability of finding a job through social networks, relative to other search methods. Using individual-level data from the UK …