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Book Review: Racial Diversity and Social Capital: Equality and Community in America, by Rodney E. Hero. New York: Cambridge University Press, 2007. 218 pp. $55.00 (cloth); $19.99 (paper)

choices are unlikely to produce green cities on their own” (p. 67). Kahn tells us that he was motivated to write this book in response to the optimistic and seemingly Pollyannaish view of the future direction of environmental harms and trust in markets to solve these problems presented by environmentalist turned skeptic Bjorn Lomborg, in his The Skeptical Environmentalist: Measuring the Real State of the World (Cambridge University Press, 2001). Kahn’s is not a refutation of Lomborg’s thesis so much as a more reflective and analytical way of thinking about the issues involved. No book is perfect, of course, and the reader may be disappointed in three areas. The reader believing that a book titled “green cities” will be about green cities, with cases and examples, will be disappointed. It is about the critical issues that will affect the ability of cities of the twentyfirst century to be green (“sustainable”), and how an economist thinks about them. Also, given the fact that the growth of cities today is and will continue to occur primarily in developing countries, the use of U.S.-based data and examples when examining the relationship between population and urban environments and sprawl is insufficient, possibly even misleading. For this discussion, much more data and examples on the experiences of cities in the developing world would be helpful to the reader. A similar limitation is that a disproportionate number of the examples used throughout the book are drawn from experiences in California, and while interesting, do not necessarily represent the best examples for readers who will be looking for applications more relevant to a broader array of cities, north and south, around the globe.