After all the fertile land in the immediate neighbourhood of the first settlers were cultivated, if capital and population increased, more food would be required, and it could only be procured from land not so advantageously situated.

Shiozawa's result saves Mankiw from his slip. Ricardian equivalence
Another idea associated with Ricardo is Ricardian equivalence an argument suggesting that in some circumstances a government's choice of how to pay for its spending (i. The first chapter serves merely as an introduction to a long book that debates an extended series of comparisons and which contrasts the various points of view while outlining Ricardo's own reasoning.

g. He was often credited with systematizing economics and was one of the most influential of the classical economists along with Thomas Malthus Adam Smith and John Stuart Mill.