This dissertation consists of three essays: Chapters 1 and 2 focus on the impact of cognitive and institutional constraints on stock market efficiency while Chapter 3 examines whether shocks to the real interest rate are a priced state variable. Chapter 1 is titled "Commodity Inattention": attention is a scarce resource for investors that must be divided among many sources of information. The commodities market is an important source of information affecting firms that operate in the economy. Investors do not fully appreciate this relationship allowing for predictability in equity returns using commodity returns. A strategy that exploits this predictability has an alpha of 1.5% per month and no meaningful factor exposure. This effect is st...