As we have stated in previous editions of this book, our goal in writing this text is simple:We hope to provide the student with a guide to the study of international economics that is accessible, comprehensive, relevant, and up-to-date. Judging by the many favorable reviews we have received from students and professors who have used this book, we feel that we have been generally successful in accomplishing our goal. Our purpose remains unchanged. To that end,

　　we have substantially revised this edition in order to cover all of the basics as well as many other topics that have recently been the subject of substantial debate.