Book excerpt: Economists from Canada and Wales chronicle the theories of international trade that have arisen over the past few decades, document the empirical evidence that has been used to support or contest them, and explore the interplay between the two activities. They do not judge the empirical methods by today's ephemeral standards, but note that they were published in the most prestigious professional journals of their time. Their primary audience are practitioners, graduates, senior undergraduates in economics. Distributed in the US by St. Martin's Press. Annotation copyrighted by Book News, Inc., Portland, OR