This review of current research on networks emphasizes three strands of the literature on social networks. The first strand is composed of models of endogenous network formation from both the economics and the computer science literature. The review highlights the sen- sitive dependence of the...

We review the accumulated knowledge on city size distributions and determinants of urban growth. This topic is of interest because of a number of key stylized facts, including notably Zipf’s law for cities (which states that the number of cities of size greater than S is proportional to 1/S)...

This paper provides the first empirical test of the role of history versus expectations in U.S. urban development. Starting from Paul Krugman's theoretical work in new economic geography, we test whether or not a modern city develops because of either advantageous initial conditions or by way of...

While interest in social determinants of individual behavior has led to a rich theoretical literature and many efforts to measure these influences, a mature "social econometrics" has yet to emerge. This chapter provides a critical overview of the identification of social interactions. We...

The paper presents a model of an economy whose urban structure consists of cities of different types. All cities of different types. All cities produce a non-tradeable final good using both types of tradeable intermediate varieties. Each city has an internal spatial structure: individuals...

This paper examines spatial effects in house price dynamics. Using panel data from 363 US Metropolitan Statistical Areas for 1996 to 2013, we find that there are spatial diffusion patterns in the growth rates of urban house prices. Lagged price changes of neighboring areas show greater effects...

This chapter presents a number of approaches that economists have used in studying neighborhood effects in housing markets. It emphasizes how individuals in effect choose neighborhood effects, or more generally social interactions, via their location decisions. The chapter looks constructively...