The phony debate over investment and the cause of crisis
One of the biggest controversies among labor theorists when it come to calculating the rate of profit is whether the profit rate should be calculated based on the original amount of capital laid out by the capitalists minus depreciation or the current cost of replacing this capital. For example, assume I bought a widget machine for 100 dollars last year. Assume also that since I bought this machine, the price of widget machines fell from 100 dollars to fifty dollars. When I calculate my profit do I do this based on my original investment of 100 dollars or on the basis of the current market price of fifty dollars?