Scollay (economics, University of Auckland) and Gilbert (agricultural economics, Washington State University) describe the effects of preferential trading arrangements in the Asia-Pacific region, predicting dire consequences of their continued use. The authors evaluate existing trade proposals; they compare trading blocs, "open regionalism," and global free trade, endorsing the latter. Chapters concentrate on recent trends, new developments, emerging patterns, choices and risks, and expected results. Annotation c. Book News, Inc., Portland, OR (booknews.com)