A natural experiment is an empirical study:
A) in which the predictions of the model are not required to be tested with data.
B) in which some process, outside the control of the experimenter, has assigned subjects to control and treatment groups in a random or nearly random way.
C) in which the researcher assigns subjects to control and treatment groups to verify a cause-effect relationshi
B
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In the circular flow model
A) households buy goods and services while firms sell goods and services. Firms obtain labor from households, capital from government, and raw materials from firms. B) households demand goods and services which are supplied by firms, and the firms demand resources that are supplied by intermediate firms. C) households buy goods and services and firms supply goods. Resources are supplied by other firms. D) households demand goods and services that are supplied by firms, while supplying resources that are demanded by firms.
If something happens to alter the quantity supplied at any given price, then
a. we move along the supply curve. b. the supply curve shifts. c. the supply curve becomes steeper. d. the supply curve becomes flatter.