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In 1988 Paul Tracy and James Fox conducted a field experiment to measure the extent to which auto body repair shops in Massachusetts inflate repair estimates for collision damage claims to insurance companies. The logic of the research involving obtaining estimates for body-damage repair costs for the same vehicles, under conditions when the damage was covered by insurance and when it was not. In short, they took 1987-model collision-damaged vehicles to selected auto body shops. At each shop, they obtained estimates of repair costs for two cars, one of which was presented as being covered by insurance and the other of which was not. Whether a car was presented as insured or uninsured at a given shop was determined by random assignment. (Statistical results clearly indicated that repair estimates were higher for vehicles presented as insured.)
a. What is the independent variable in this experiment?
b. What is the dependent variable?
c. Suppose that only male drivers in their early twenties posed as owners of the vehicles. What effect, if any, would this have on the internal and external validity of the study?
Eps Growth Rate
The annual rate at which a company's earnings per share (EPS) has grown over a specified time period.
Rate Of Return
The gain or loss of an investment over a certain period, expressed as a percentage of the investment's initial cost.
Npvgo
Net Present Value of Growth Opportunities; a measure evaluating the profitability of future investments by comparing their present value to the initial outlay.
Required Return
The minimum annual return rate that incites people or companies to allocate resources to a particular investment or project.
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