Do high levels of human capital foster economic growth by facilitating technology adoption? If so, countries with more human capital should have adopted more rapidly the skilled-labor augmenting technologies becoming available since the 1970’s. High human capital levels should therefore have...

This paper extends a recent class of quantitative models of international trade to incorporate factor mobility within countries. We present a model-based decomposition of the variance of economic activity into the contributions of locational fundamentals, market access and their covariance. We...

I analyze the basis of the market economy in classical Rome, from the perspective of personal-versus-impersonal exchange and focusing on the role of the state in providing market-enabling institutions. I start by reviewing the central conflict in all exchanges between those holding and those...

This (revised) study seeks to examine the rise, expansion, and ultimate decline of the Italian wool-based textile industries over a period of six centuries (from ca. 1100 to ca. 1730). An international trade model combining transaction costs and comparative advantage is employed to explain the...

During the hundred-year period from about 1320 to about 1420, the Florentine woollen cloth industry underwent two closely connected crises. The first crisis was the consequence, direct and indirect, of the ravages of warfare and falling population, afflicting the entire Mediterranean basin and...

This is a substantially revised version of an earlier Working Paper (posted in 2002, with a different title), based on much new data and other information. It re-examines Earl Hamilton’s famous 1929 thesis on ‘Profit Inflation’ and the ‘birth of modern industrial capitalism’: namely,...

We draw attention to the role of economic geography in explaining important cross-sectional facts which are difficult to account for in existing models of industrialization. By construction, closed-economy models that stress the role of local demand in generating sufficient expenditure on...

This paper derives a micro-founded gravity equation in general equilibrium based on a translog demand system that allows for endogenous markups and substitution patterns across goods. In contrast to standard CES-based gravity equations, trade is more sensitive to trade costs if the exporting...

This paper presents a model of international trade that features heterogeneous firms, relativeendowment differences across countries, and consumer taste for variety. The paper demonstrates thatfirm reactions to trade liberalization generate endogenous Ricardian productivity responses at...

Although economists have long been aware of Jensen's inequality, many econometric applications have neglected an important implication of it: the standard practice of interpreting the parameters of log-linearized models estimated by ordinary least squares as elasticities can be highly misleading...