Government Matters: Welfare Reform in Wisconsin. By Lawrence M. Mead. Princeton: Princeton University Press, 2004. 368p. $35.00 cloth, $22.95 paper.

One of the most challenging aspects of welfare reform was that it made policy evaluation more difficult, especially after the Personal Responsibility and Work Opportunity Act of 1996 allowed states to shift from operating federal public assistance programs (or variants under waiver authority) to implementing programs of their own design. Analysts accustomed to studying a relatively stable set of nationally comparable social programs had to begin asking new, and sometimes startlingly basic, questions about the kinds of benefits that state and local governments were providing, to whom they were providing them, and on what basis. As a result, research on U.S. poverty and welfare reliance suffered a major setback at precisely the time when the need to track policy outcomes became especially critical.