ECON361 Chapter Notes - Chapter 12: Social Discount Rate, Deadweight Loss, Aid To Families With Dependent Children
9 Aug 2016
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Purpose: valuing costs and benefits from experiments and quasi experiments. Conducting a cba requires a comparison between alternatives (usually the program and the status quo). Evaluation design is the scheme used to make such comparisons. A number of ways exist to make comparisons. The design used affects the internal validity of the study (i. e. , whether the measured differences between the alternatives can be accurately attributed to the program being evaluated). Five examples of possible evaluation designs are summarized in. The treatment and control groups are measured both before and after the treatment. The design uses random assignment to assign individuals to the groups, which leads to high internal validity. Thus, this is the best of the five alternative designs. Like all evaluation designs, it may not provide external validity that is, it may not be possible to generalize the findings to other groups or time periods. This is the same as design 1, but no baseline data are collected.
