Airplanes are a fast but expensive means of shipping goods, a fact which has implications for comparative advantage. The paper develops a Ricardian model with a continuum of goods which vary by weight and hence transport cost. Comparative advantage depends on relative air and surface transport...

The core subjects of trade theory are the pattern and volume of trade: which goods are traded by which countries, and how much of those goods are traded. The first part of the paper discusses evidence on comparative advantage, with an emphasis on carefully connecting theory models to data...

In the last quarter century, wage inequality has increased dramatically in the United States. At the same time, the US has become more integrated into the world economy prices of final goods have changed, the capital stock has more than doubled has become steadily more educated. This paper...

Many economists and policy makers are concerned about international differences in technology and labor quality, correctly seeing these issues as crucial to long term growth in living standards. Typically, international trade economists assume that technological knowledge is the same in all...

The standard neoclassical model of trade theory predicts that international specialization will be jointly determined by cross-country differences in relative factor endowments and relative technology levels. This paper uses duality theory combined with a flexible functional form to specify an...

In 1991, the Japanese economy ended a historic expansion and entered a period of stagnation that has yet to abate. Nine years later, the US economy ended a similarly historic expansion. There were many similarities in the two countries' expansions: asset price bubbles, a real investment boom,...

An important element of the cost of distance is time taken in delivering final and intermediate goods. We argue that time costs are qualitatively different from direct monetary costs such as freight charges. The difference arises because of uncertainty. Unsynchronised deliveries can disrupt...

International trade in apparel and textiles is regulated by a system of bilateral tariffs and quotas known as the Multifiber Arrangement or MFA. Using a time series of detailed product-level data from the United States on the quotas and tariffs that comprise the MFA, we analyze how the MFA...

Does Japanese trade in manufactured goods differ from the rest-of-the world average and from the U.S.? We use a simple industry-level gravity model and 1981-1998 data to answer this question. We construct a measure of normalized imports by dividing bilateral industry-level imports by the...

Time is money, and distance matters. We model the interaction of these truisms, and show the implications for global specialization and trade: products where timely delivery is important will be produced near the source of final demand, where wages will be higher as a result. In the model,...