The manager of an ice-cream parlor decides to introduce a new ice-cream flavor in his Dallas, TX based restaurants to compare the sales of these restaurants to the ones with no new flavors. She decides to run a difference in difference approach. Which of the following is true?
a. The first difference would be the difference in the sales of the Dallas stores before and after the introduction
b. The second difference would be the difference in the sales in other stores before and after the Dallas stores introduced the new flavor
c. The second difference would be the difference between the post introduction sales in the Dallas stores and the control group
d. Only A&B
d
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The Monetary Control Act of 1980 :
The major distinction between the experiments and quasi-experiments chapter and earlier chapters is the
A) frequent use of binary variables. B) type of data analyzed and the special opportunities and challenges posed when analyzing experiments and quasi-experiments. C) superiority of TSLS over OLS. D) use of heteroskedasticity-robust standard errors.
Suppose a perfectly competitive cotton farmer can produce 10 containers of cotton at an output at which marginal cost equals marginal revenue. The price per container of cotton is $100 and the average total cost is $75
What is the profit or loss that this cotton farmer is earning? A) $750 B) $150 C) $250 D) -$25
The academic ability of students studying to be teachers has
A. increased markedly in recent years. B. remained roughly the same in time. C. decreased markedly, particularly among women, in recent years. D. decreased markedly, particularly among men, in recent years.