I look for divisions to clusters among academic departments in three disciplines: economics, mathematics, and comparative literature. I define clusters as subsets of departments with unexpectedly little hiring across the cluster lines. The division within economics is by far the strongest, is...

We present a framework for studying the relation between the distribution of income and the distribution of housing prices that is based on an assignment model of households with heterogeneous incomes and houses of heterogeneous quality. The equilibrium distribution of prices depends on both...

We investigate divisions within the citation network in economics using citation data between 1990 and 2010. We consider all partitions of top institutions into two equal-sized clusters, and pick the one that minimizes cross-cluster citations. The strongest division is much stronger than could...

A basic problem facing most labour markets is that workers can neither commit to long-term wage contracts nor can they self-finance the costs of production. I study the effects of these imperfections when talent is industry-specific; it can only be revealed on the job, and once learnt becomes...