Many cultural products have the same non-rival nature as scientific knowledge. They therefore face identical difficulties in creation and dissemination. One traditional view says market failure is endemic – societies tolerate monopolistic inefficiency in intellectual property (IP) protection...

This paper shows how standard methods can be used to formulate and estimate a dynamic index model for random fields—stochastic processes indexed by time and cross section where the time-series and cross-section dimensions are comparable in magnitude. We use these to study dynamic comovements...

This paper models fluctuations in regional disaggregates as a non-stationary, dynamically evolving distribution. Doing so enables the study of the dynamics of aggregate fluctuations jointly with those of the rich cross-section of regional disaggregates. For the United States, the leading state...

I show that the Engle-Kozicki formulation of common features--applied to international business cycles--has some surprising, counterintuitive, and, I argue, undesirable implications. Such implications can be derived only on a case-by-case basis, however, and are necessarily specific to each...

Many alternative measures of core, or underlying, inflation have been proposed that are based on stripping out some unwanted or excessively volatile elements from the headline rate. A potential drawback of such measures is that they are necessarily atheoretic - based largely on purely...

It is often argued that the presence of a unit root in aggregate output implies that there is no "business cycle": the economy does not return to trend following a disturbance. This paper makes this notion precise, but then develops a simple aggregative model where this relation is contradicted....

We interpret fluctuations in GNP and unemployment as due to two types of disturbances: disturbances that have a permanent effect on output and disturbances that do not. We interpret the first as supply disturbances, the second as demand disturbances. We find that demand disturbances have a hump...