We consider an efficiency-wage model with the Calvo-type sticky prices and analyze optimal monetary policy when unemployment insurance is not perfect. With imperfect risk sharing, strict zero-inflation policy is no longer optimal even if the zero-inflation steady-state equilibrium is assumed to...

A defining feature of business cycles is the comovement of inputs at the sectorial level with aggregate activity. Standard models cannot account for this phenomenon. This paper develops and estimates a two-sector dynamic general equilibrium model which can account for this key regularity. My...

In 1910 the average American city was a small and densely populated place where the dominant form of intracity transportation was the electric streetcar. Despite the release of the Model T in 1908, less than one percent of Americans owned a car. In contrast, by 1970, almost every family in the...

This paper develops a set of criteria for identifying the arrival of a general purpose technology (GPT) and applies them to the electification and IT "revolutions" of the late 19th and early 20th centuries. The criteria suggest that a GPT should be 1) pervasive, 2) improving over time, and 3)...

This paper attempts to provide a coherent general equilibrium explanation for the joint U.S-British evolution during the last thousand years. We typified this period by initial Malthusian stagnation (before 1500); discovery and colonization (between 1500 and 1750); independence of the colony and...

The emergence of medieval markets has been seen in the literature as hampered by lack of contract enforcement and institutions like merchants’ communal responsibil-ity. Merchants traveling to a different marketplace could be held liable for debts in-curred by any merchant from their...

A central debate in applied macroeconomics is whether statistical tools that use minimal identifying assumptions are useful for isolating promising models within a broad class. In this paper, I extend the analysis of Chari, Kehoe, and McGrattan (2005) to compare four statistical...

This paper finds a solution to some of the discrepancies between the data and what standard complete markets models predict. Specifically, those related to the cross-country correlations of consumption, output and factors of production. I match the data and get positive cross country comovements...