This dissertation is a collection of four papers using non-standard preferences to better understand the behavior of asset prices and households. The first paper shows that present bias in an equilibrium model has the ability to explain multiple features of bond behavior. The second paper investigates the consequences of regret aversion for asset prices in an otherwise standard model of financial markets. The third paper combines experimentally elicited preferences with administrative microdata and explains actual annuitization decisions. The fourth paper demonstrates that risk and time preferences are time varying, and that they are related to trading behavior in an expected way.