This paper recalls the unity of economics and history at MIT before the Second World War, and their divergence thereafter. Economic history at MIT reached its peak in the 1970s with three teachers of the subject to graduates and undergraduates alike. It declined until economic history vanished...

The standard approach to policy-making and advice in economics implicitly or explicitly ignores politics and political economy, and maintains that if possible, any market failure should be rapidly removed. This essay explains why this conclusion may be incorrect; because it ignores politics,...

This paper develops a framework to analyze the relationship between the diffusion of new technologies and the decentralization decisions of firms. Centralized control relies on the information of the principal, which we equate with publicly available information. Decentralized control, on the...

This paper reports on the first randomized evaluation of the impact of introducing the standard microcredit group-based lending product in a new market. In 2005, half of 104 slums in Hyderabad, India were randomly selected for opening of a branch of a particular microfinance institution...

This paper presents a narrative of currency crises for the past two centuries. I use the Swan Diagram as a theoretical framework for this narrative and conclude that many so-called banking crises are in fact currency crises. These crises are caused by capital flows in war and peace and typically...

This paper uses new data to extend the argument that there was an integrated wheat market in the late Roman Republic and early Roman Empire. I explore the meaning of randomness when data are scarce, and I investigate how we recreate the nature of ancient societies by asking new questions that...

Whenever unemployment stays high for an extended period, it is common to see analyses, statements, and rebuttals about the extent to which the high unemployment is structural, not cyclical. This essay views the Beveridge Curve pattern of unemployment and vacancy rates and the related matching...

An emerging literature argues that changes in the allocation of workplace “tasks” between capital and labor, and between domestic and foreign workers, has altered the structure of labor demand in industrialized countries and fostered employment polarization — that is, rising employment in...

We provide a framework for studying the relationship between the financial network architecture and the likelihood of systemic failures due to contagion of counterparty risk. We show that financial contagion exhibits a form of phase transition as interbank connections increase: as long as the...

The lowest level of government in sub-Saharan Africa is often a cadre of chiefs who raise taxes, control the judicial system and allocate the most important scarce resource - land. Chiefs, empowered by colonial indirect rule, are often accused of using their power despotically and inhibiting...