Discusses the four elements of an experimental design: 1) who participates, 2) experimental treatments, 3) the number of subjects and their allocation, and 4) experiment location and conditions. Also considers difficulties related to random assignment and describes experimental operations.

This paper outlines the purpose and rationale of the income maintenance experiments in Seattle and Denver. A review of experimental design and operation is presented, and particular reference is made to methods for minimizing bias arising from the limited experimental nature of the study. The...

Results from the Seattle and Denver Income Maintenance Experiments are used to predict nationwide labor-supply effects and costs of six alternative negative income tax programs. To make the predictions, a labor-supply model parameterizing the experimental treatments is estimated using...

In this volume, a select group of UI researchers describes the motivation for and the design, implementation, and impacts of UI bonus experiments administered in Illinois, Pennsylvania, and Washington. They also describe the benefits and costs of the various experimental treatments for the...