Approaches to Evaluating Welfare Reform: Lessons from Five State Demonstrations. c. Sample Sizes


Appropriate sample size standards for surveys are also a concern. Because survey data collection is so expensive, there is consensus that sample sizes for surveys need not be as large as in the part of the evaluation based on administrative records. As in selection of the overall sample, however, it is useful to be clear about the precision standard being used and the trade-offs between survey cost and precision.