Problem
1. In our discussion of the evidence of the effects of minimum wage changes, we said, "If economists could conduct direct experiments, such as those performed in the physical sciences, they would not have this problem." Exactly what problem were we referring to?
2. What is the difference between cross-sectional and time-series studies? Does one hold "more things fixed" than the other?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.