1. Rajarshi Guhaniyogi is Associate Professor, Department of Statistics, Texas A & M University, College Station, Texas 77843, USA
2. Cheng Li is Assistant Professor, Department of Statistics and Data Science, National University of Singapore, Singapore
3. Terrance Savitsky is Senior Research Mathematical Statistician, U.S. Bureau of Labor Statistics, Washington D.C. 20212, USA
4. Sanvesh Srivastava is Associate Professor, Department of Statistics and Actuarial Science, The University of Iowa, Iowa City, Iowa 52240, USA