Book excerpt: Enterprise zones have been part of American urban policy for over 20 years. In this book, the authors (urban and regional planning, the University of Iowa) use a hypothetical firm methodology to measure the value of enterprise zone incentives to business, involving construction of a set of financial statements for typical firms and application of tax code and incentives to those firms. They briefly discuss this model (with technical information on the model included in an appendix), and look at the results of enterprise zone programs in place in 13 states. Annotation copyrighted by Book News, Inc., Portland, OR