Empirical Investigations into Whether Differences in Income Per Person Are

Empirical investigations into whether differences in income per person are the result of differences in the quantities of the factors of production available or differences in the efficiency with which the factors are employed typically find:

A) a negative correlation between the quantity of factors and the efficiency of use.
B) a positive correlation between the quantity of factors and the efficiency of use.
C) no correlation between the quantity of factors and the efficiency of use.
D) large gaps between the quantity of factors accumulated and the efficiency of use.