We model an environment in which different vintages of capital with their different productivities coexist. A reduction in the cost of investment induces investment in new capital which raises both measured capital and measured productivity simultaneously. We calibrate this model to...

We introduce a joint model of labor market search and firm size dynamics to explain the differential in labor market and productivity outcomes between the U.S. and the European Union. At the core, our model is a hybrid of the labor market search model by Mortensen and Pissarides (1994) and the...

During the 1990s, market hours in the United States rose dramatically. The rise in hours occurred as gross domestic product (GDP) per hour was declining relative to its historical trend, an occurrence that makes this boom unique, at least for the postwar U.S. economy. We find that expensed plus...

Beginning with the seminal work by Kydland and Prescott, standard business cycle theory has credited technology shocks with being a major source of business cycle fluctuations. Unfortunately, these shocks, by their nature, are hard to identify and measure. This paper utilizes new measures of...

In this paper we assess the role of reallocation of resources -- through shifts in market shares among incumbents as well as through firm entry and exit – to productivity. We are motivated by the evidence in all countries studied of heterogeneity of firms and substantial mobility of...

In this paper I estimate unobserved labor-generated knowledge spillovers within and among six large macroeconomic sectors covering the totality of the US civilian economy from 1948 to 1991. Unobserved spillovers are identified by observed TFP changes measured using Dale Jorgenson’s...

There exists significant dispersion in output prices between firms in many industries. As a consequence the value of output is not necessarily a good measure of the quantity of output. Estimation of production functions for these types of goods is thus challenging if quantities and prices of...