Expected Returns on Major Asset Classes - Ilmanen (2012)

This article is written by Ilmanen from AQR. It is a very good summary of fundamental ideas (mostly smart beta) floating in different asset classes. 

Ch1 Introduction
Asset class expected returns and risk premia are time varying and somewhat predictable.

Ch2 Equity Risk Premium
Ch3 Bond Risk Premium
Ch4 Credit Risk Premium
Ch5 Alternative Risk Premium