A renda extensiva da terra em um sistema sraffiano

Abstract

It is known that a change in the profit rate can modify the ordering of rents (gradient) of different types of land_ This paper presents an example where this ordering for two types of land is changed by introducing a third and less efficient type of land, even when the profit rate is kept constant. Another example shows that a given type of land can pay positive rent for low and high profit rates, and not pay rent for intermediate values of the profit rate.