The digest of social experiments

摘要: Social experiments provide the most reliable guide to potential impacts of policy change because their methodology allows analysts isolate effect from other, potentially distorting factors. This revised and updated edition Digest Experiments documents 240 completed 21 ongoing social experiments. In addition findings, each summary details target populations, policies tested, experimental designs related issues, sites, key staff, sources further information, public access data. The authors also discuss theory practice experimentation, reasons for conducting experiments, ethical non-experimental methodologies that have been proposed as substitutes. They examine uses in process, offer a brief history experimentation.