Yoosoon Chang is Professor of Economics at Indiana University, USA, with a Ph.D. in Economics from Yale University. Professor Chang's current research interests include the application of various econometric time series, panel data, and machine learning models.Sokbae Lee is Professor of Economics at Columbia University, USA, with a PhD in Economics from the University of Iowa. Professor Lee’s current research focuses on theoretical and applied econometrics.J. Isaac Miller is Professor of Economics and Associate Chair of the Department of Economics at the University of Missouri, USA, with a PhD in Economics from Rice University. Professor Miller’s current research focuses on econometric time series and panel data models of energy and climate change.