Which of the following is not an example of a natural experiment an economist might use to evaluate a theory? a. Transit ridership increased in Atlanta following an increase in gas prices. b. Federal tax revenue increased following a decrease in the tax rate. c. Students in a principles of microeconomics course are asked to play a game with classmates to determine what decisions they make under certain circumstances. d. Following the imposition of austerity measures, the growth rate of the economy in Greece slowed.

Example of not a natural experiment an economist might use to evaluate a theory is:

C. Here the Students in a microeconomics principles course are advised to play a game with their classmates to determine and evaluate what all decisions they make under certain adjusted circumstances.

Explanation:

Natural experiment : A natural experiment is referred to an observational and also an empirical study in which we get to study about the experimental and controllable varieties of variables. which can not het manipulated anywhere by the researchers.

Instead these experiments are allowed to affect the environment and the nature or the different factors which are not under control of our researchers. In contrast to the experimental values and all the natural experiments are even not controlled by the researchers but instead they also admire and obseve those experiments for their own studies.

So, the right option is:

C. Here the Students in a microeconomics principles course are advised to play a game with their classmates to determine and evaluate what all decisions they make under certain adjusted circumstances.