Historicity of Capital -- 3. Economic Epistemology -- 4. Ricardo, Keynes and Stiglitz: The Epistemological Convergences -- Part II … Ricardo and Keynes. On the other hand, the value of some quantity of aggregate capital changes over time, as demonstrated by … Ricardo, Keynes and Stiglitz. For this purpose, this book considers Ricardo, Keynes and Stiglitz. For each author, capital is …