This paper sets out a theory of how openness to international goods markets affects pollution concentrations. We develop a theoretical model to divide trade's impact on pollution into scale, technique, and composition effects and then examine this theory using data on sulfur dioxide...

Do scale economies contribute to our understanding of international trade? Do international trade flows encode information about the extent of scale economies? To answer these questions we examine the large class of general equilibrium theories that imply Helpman-Krugman variants of the Vanek...

It is widely believed that once news is made public the information is fully reflected in prices within at most a day or two (the efficient market hypothesis). We test this idea using the set of 245,429 Wall Street Journal corporate news stories from 1973 to 2001. Using computational linguistics...

Do scale economies contribute to our understanding of international trade? Do international trade flows encode information about the extent of scale economies? To answer these questions we examine the large class of general equilibrium theories that imply Helpman-Krugman variants of the Vanek...

This paper sets out a theory of how openness to international goods markets affects pollution concentrations. We develop a theoretical model to divide trade's impact on pollution into scale, technique, and composition effects and then examine this theory using data on sulfur dioxide...

As voters switch political preferences from election to election, understanding the magnitude of voter flows among parties and transitions between voters and non-voters is an essential element of political analysis. As exit polls are uncommon in Canada, voter migration can also be estimated...

Literally millions of messages have been posted on internet stock message boards. Financial press reports claim that these postings can move markets. We study message posting on Yahoo! Finance and Raging Bull for the firms that were in the Dow Jones Industrial Average and the Dow Jones Internet...