The rationale for a multistage approach to evaluating services demonstration programs is discussed. The approach takes into account limitations that are often found in such programs. The National Evaluation of Models for Linking Drug Abuse Treatment and Primary Care provides an example. (SLD)

Some of the major issues related to planning evaluations of federal human services national demonstration programs are discussed. Barriers to conducting evaluations are discussed for the policy level and cross-site and within-site evaluation contexts. Among the proposed solutions is the use of an explicit programmatic developmental sequence. (SLD)