This paper reviews four treatment parameters that have become commonly used in the program evaluation literature: the average treatment effect, the effect of treatment on the treated, the local average treatment effect, and the marginal treatment effect. We derive simply computed closed-form expressions for these treatment parameters in a latent variable framework with Gaussian error terms. These parameters can be estimated using nothing more than output from a standard two-step procedure. We also briefly describe recent work that seeks to go beyond mean effects and estimate the distributions associated with various outcome gains. The techniques presented in the paper are applied to estimate the return to some form of college education for various populations using data from the National Longitudinal Survey of Youth.
The Southern Economic Journal features original, refereed scholarly articles in all areas of economics as well as contributions on the pedagogy of economics. The journal also contains occasional invited papers such as the Distinguished Guest Lecture, and the Presidential Address from the annual conference of the Southern Economic Association (SEA). In addition, the journal serves members of SEA and other readers interested in economics through the publication of book reviews, and announcements. The Southern Economic Journal has been published quarterly by the Southern Economic Association since its inception in 1933, and currently contains approximately 1,000 printed pages per year.
The Southern Economic Association (SEA) was founded in 1927 to further the education of scholars and the public in economic affairs. Toward this end, the organization seeks to stimulate interest in and disseminate results of recent research in theory, policy making, business practices, and regulation. Currently, SEA has approximately 1,000 members worldwide, and more than 1,000 additional institutional subscribers to the journal. The Association holds its annual conference meetings in November, and publishes quarterly the Southern Economic Journal.