An example of a randomized controlled experiment is when
A) households receive a tax rebate in one year but not the other.
B) one U.S. state increases minimum wages and an adjacent state does not, and employment differences are observed.
C) random variables are controlled for by holding constant other factors.
D) some 5th graders in a specific elementary school are allowed to use computers at school while others are not, and their end-of-year performance is compared holding constant other factors.
Answer: D
You might also like to view...
Adding wages, interest, rent, and profits yields
A) net domestic product at factor cost. B) gross domestic product at factor cost. C) total expenditure. D) GNP. E) gross domestic product.
A difference between a perfectly competitive industry and a monopoly is that
A) in the long run, firms in a perfectly competitive industry make zero economic profit and a monopoly can make an economic profit. B) a firm in a perfectly competitive industry can perfectly price discriminate but a monopoly cannot. C) only monopolies have an incentive to maximize profit. D) perfectly competitive firms can have a public franchise. E) a barrier to entry protects perfectly competitive firms in the short run and protects a monopoly in the long run.