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...

Recent tests for the convergence hypothesis derive from regressing average growth rates on initial levels: a negative initial level coefficient is interpreted as convergence. These tests turn out to be plagued by Francis Galton's classical fallacy of regression towards the mean. Using a dynamic...

Can the increasing significance of knowledge-products in national income---the growing weightless economy---influence economic development? Those technologies reduce ``distance'' between consumers and knowledge production. This paper analyzes a model embodying such a reduction. The model shows...

Internet development holds the promise of transmitting economic value across physical space at zero marginal cost. In such a 'weightless economy', what factors matter for the location of economic activity and thus for economic development? This paper sketches a model of spatial dynamics over a...

Convergence concerns poor economies catching up with rich ones. At issue is what happens to the cross-sectional distribution of economies, not whether a single economy tends towards its own steady state. It is the latter, however, that has preoccupied the traditional approach to convergence...

We review the role of R&D in endogenous growth theory, and describe extant empirical research – macro and micro – bearing on R&D as an engine of growth. Taking R&D to be key, while recognizing the significance of economic incentives, emphasizes knowledge as an economic object and, more...

This Paper studies growth and inequality in China and India – two economies that account for a third of the world’s population. By modelling growth and inequality as components in a joint stochastic process, the Paper calibrates the impact each has no different welfare indicators and on the...

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...

Typical analyses of trends and cycles take as given some (one) observable economic variable in whose time path a researcher wishes to find trend and cycle movements. But individual sectors and regions in aggregate economies move neither perfectly with nor independently of each other -- why is it...

This Paper develops a model of economic growth and activity locating endogenously on a 3-dimensional featureless global geography. The same economic forces influence simultaneously growth, convergence, and spatial agglomeration and clustering. Economic activity is not concentrated on discrete...