The distinction between conditional and unconditional factor pricing models is explained. The conditional CAPM implies that unconditional risk premia are linear in the expected beta and the beta of the beta. The CCAPM and ICAPM are derived as approximate relations in discrete time. Testing conditional models is equivalent to unconditional tests of pricing for managed portfolios. The Gordon growth model is derived, assuming that dividend growth and the single‐period SDF are IID over time. The equity premium and risk‐free rate puzzles are derived from the Gordon growth model with a CRRA investor and lognormal consumption growth. The Campbell‐Shiller linearization implies that dividend yields predict either future returns or future dividend growth.
A Note on the Gordon Growth Model with Nonstationary Dividend Growth