When the production function is represented by Y = NA, labor productivity is represented by which of the following expressions?

The greater the social immobility is within a country, the greater the chance that human talent and skills will not go to waste

Indicate whether the statement is true or false

It is difficult to empirically test alternative macroeconomic models against one another because

A. macroeconomic models are always expressed in scientific terms. B. macroeconomic models cannot be expressed in mathematical terms. C. macroeconomic models do not predict the same outcomes from policies. D. macroeconomic models differ in ways that are hard to standardize for.