Which of the following was a major omission from Ulrich B.Phillip's proxy for the rate of return in slavery?

Question

Quizplus · Accepted Answer

Ulrich Phillips' proxy for the rate of return in slavery did not account for the productivity of slaves, which is a major omission as it directly affects the profitability of owning slaves. Other factors such as the price of cotton, the price of slaves, the rate of interest, and the maintenance cost of slaves were included in his calculations.

Which of the Following Was a Major Omission from Ulrich