Affiliation: | 1. Mathematics Department, Tulane University, 6823 St. Charles Avenue, New Orleans, LA 70118, USA;2. Department of Statistics and Probability, Michigan State University, 619 Red Cedar Road, East Lansing, MI 48824, USA;3. Department of Statistics and Operations Research, University of North Carolina at Chapel Hill, CB#3260, Hanes Hall, Chapel Hill, NC 27599, USA |