Chapter 17 Microstructure and asset pricing Market microstructure and asset pricing both consider the behavior and formation of prices in asset markets. Yet neither literature explicitly recognizes the importance and role of the factors so crucial to the other approach. This survey seeks to join the two literatures by surveying the work linking microstructure factors to asset price dynamics. In the short run these dynamics involve issues such as the auto correlation and cross correlation structure of stocks and our survey will examine the literature relating these correlation structures to microstructure factors such as non synchronous trading and dealer behavior. In the longer run issues such as liquidity and the relation of private information to asset price dynamics are important. We survey the theoretical work linking microstructure factors to long run returns and we consider why stock prices might be expected to reflect premia related to liquidity or informational asymmetries. We also survey the empirical literature testing these relationships. We then discuss what issues remain contentious and we provide some guidance for future research. We hope to show in this survey that asset pricing dynamics may be better understood by recognizing the role played by microstructure factors and that microstructure research can be enhanced by a greater understanding of its linkages with fundamental economic variables.