As an apparent result of airline deregulation,
a. many small communities have been left without airline service.
b. the wages and benefits of airline workers have been reduced.
c. air fares have risen more quickly than they probably would have under continued regulation.
d. small commuter airlines have almost vanished.
b
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Which of the following is most likely to increase an individual's future spending?
A) Paying back a loan in the future B) Borrowing money today C) Depositing money in the future D) Withdrawing money in the future
Randomization based on covariates is
A) not of practical importance since individuals are hardly ever assigned in this fashion. B) dependent on the covariances of the error term (serial correlation). C) a randomization in which the probability of assignment to the treatment group depends on one of more observable variables W. D) eliminates the omitted variable bias when using the difference estimator based on Yi = ?0 + ?1Xi + ui, where Y is the outcome variable and X is the treatment indicator.