NBER Working Papaers on WTO

Do We Really Know that the WTO Increases Trade?
Andrew K. Rose,
American Economic Review, 2004, v94(1,Mar), 98-114.

Abstract: This paper estimates the effect on international trade of multilateral trade agreements: the World Trade Organization (WTO), its predecessor the Generalized Agreement on Tariffs and Trade (GATT), and the Generalized System of Preferences (GSP) extended from rich countries to developing countries. I use a standard gravity' model of bilateral merchandise trade and a large panel data set covering over fifty years and 175 countries. An extensive search reveals little evidence that countries joining or belonging to the GATT/WTO have different trade patterns than outsiders. The GSP does seem to have a strong effect, and is associated with an approximate doubling of trade.

The WTO Promotes Trade, Strongly But Unevenly.
Arvind Subramanian,
Issued in October 2003.

Abstract: Contrary to the recent literature that concludes that the GATT/WTO has been completely ineffective in promoting world trade, this paper furnishes robust evidence that the institution has had a powerful and positive impact on trade. The impact has, however, been uneven. GATT/WTO membership for industrial countries has been associated with a large increase in imports estimated at about 44 percent of world trade. The same has not been true for developing country members, although those that joined after the Uruguay Round have benefited from increased imports. Similarly, there has been an asymmetric impact between sectors. These results are consistent with the history and design of the institution.

Do WTO Members have More Liberal Trade Policy?.
Andrew K. Rose,
Issued in November 2002.

Abstract: This paper uses 68 measures of trade policy and trade liberalization to ask if membership in the World Trade Organization (WTO) and its predecessor the General Agreement on Tariffs and Trade (GATT) is associated with more liberal trade policy. Almost no measures of trade policy are significantly correlated with GATT/WTO membership. Trade liberalizations, when they occur, usually lag GATT entry by many years, and the GATT/WTO often admits countries that are closed and remain closed for years. The exception to the negative rule is that WTO members tend to have slightly more freedom as judged by the Heritage Foundation's index of economic freedom.

Does the WTO Make Trade More Stable?.
Andrew K. Rose,
Issued in January 2004.

Abstract: I examine the hypothesis that membership in the World Trade Organization (WTO) and its predecessor the General Agreement on Tariffs and Trade (GATT) has increased the stability and predictability of trade flows. I use a large data set covering annual bilateral trade flows between over 175 countries between 1950 and 1999, and estimate the effect of GATT/WTO membership on the coefficient of variation in trade computed over 25-year samples, controlling for a number of factors. I also use a comparable multilateral data set. There is little evidence that membership in the GATT/WTO has a significant dampening effect on trade volatility.