Handbook in Econometrics, Volume 7B, the latest release in this ongoing series, examines recent advances in foundational issues and "hot" topics within econometrics, such as inference for moment inequalities and estimation of high dimensional models. Chapters in this updated release cover Decision Theory and Econometric Analysis, Modelling Economic Agents as Econometricians, Econometric Analysis under Model Misspecification and Model Uncertainty, The Role of Assumptions in Econometric Analysis, Abduction, Structural Econometrics, Instrumental Variables/Moments-Based Estimators, Conditional Moments, Weak Instruments, Instrumental Variable Selection, Generalized Instrumental Variables, Moment Inequalities, Nonlinear and Nonparametric Methods, and much more.