ECO 4403 University of Toronto Method of Inquiry in Economics Questions
Question Description
Answer each of the following in a few sentences. References are to required readings
1. Why is random assignment of participants to control and treatment groups a central feature of lab, social and field experiments?
2. According to Falk and Fehr (2003), what are three objections to lab experiments?
3. Explain how attrition can cause bias in a social experiment.
4. Explain how substitution can cause bias in a social experiment.
5. Explain why the evaluation of the effect of a training program on earnings using a non-experimental study is likely to suffer from selection bias.
6. Match the following description to one type of experiments:
It examines outcomes for observations in treatment groups and comparison/control groups that are not randomly assigned? (a) lab; (b) field; (c) social; (d) natural
7. Consider a situation where researchers use an unusually large change in a province A’s minimum wage to study how it affects employment. They compare the change in employment in province A to the change in employment in province B where the minimum wage is kept constant.
(a) What kind of experiment are they using?
8. Meyer (1995) lists nine threats to internal validity of natural experiments. Describe three.
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