Instead of conducting laboratory experiments to generate data to test their theories, economists often a. do without data. b. rely upon hypothetical data that were previously concocted by other economists. c. gather data from historical episodes of economic change. d. substitute assumptions for data when data are unavailable.

Respuesta :

The economists are often seen to perform substitution of assumptions by unavailability of data, rather than conducting laboratory experiments for testing their theories.

Who are economists?

Economists are such professional experts who are involved in the study of economies and have a deep knowledge of the matters related thereto.

They are generally concerned with the matters of use, creation, development, and presentation of data, which revolve around the economic issues.

Sometimes unavailability of data obligates the economists to substitute this with making relevant assumptions in order to perform an experimentation of their theories.

Hence, option D; economists substitute assumptions in case of unavailability of data.

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