We compare sparse and dense representations of predictive models in macroeconomics, microeconomics, and finance. To deal with a large number of possible predictors, we specify a prior that allows for both variable selection and shrinkage. The posterior distribution does not typically concentrate...

"This book reviews the three most popular methods (and their extensions) in applied economics and other social sciences: matching, regression discontinuity, and difference in differences. The book introduces the underlying econometric/statistical ideas, shows what is identified and how the...

Panel data model with stationary and nonstationary regressors and error terms -- Panel time trend model with stationary and nonstationary error terms -- Estimation of change points in stationary and nonstationary regressors and error term -- Weak instruments in panel data models -- Incidental...