Generalizing the Permanent-Income Hypothesis: Revisiting Friedman's Conjecture on Consumption
Friedman's contribution to the consumption literature goes well beyond the seminal permanent-income hypothesis. He conjectured that the marginal propensity to consume out of financial wealth shall be larger than out of "human wealth," the present discounted value of future labor income. I present an explicitly solved model to deliver this widely-noted consumption property by specifying that the conditional variance of changes in income increases with its level.