Threats to internal validity of quasi-experiments include
A) failure of randomization.
B) failure to follow the treatment protocol.
C) attrition.
D) all of the above with some modifications from true randomized controlled experiments.
Ans: D) all of the above with some modifications from true randomized controlled experiments.
Economics
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If an individual is to hold lower money balances on average, she must make more frequent trips to the bank to withdraw money. This inconvenience of reducing money holding is called:
A. a menu cost. B. a shoeleather cost. C. an inflation tax. D. seigniorage.
Economics
Agraria sends wheat to Cyberia in exchange for computers and technology goods. This is an example of
a. unidirectional trade. b. joint venture. c. barter. d. monetary exchange.
Economics