1. Department of Apparel, Educational Studies, and Hospitality Management, 1066 Le Baron Hall, Iowa State University, Ames, IA 50011-1121, USA
2. Department of Textiles, Clothing and Design, 105 HECO, University of Nebraska-Lincoln, Lincoln, NE 68583-0800, USA
3. Department of Statistics and Department of Political Science, 539 Ross Hall, Iowa State University, Ames, IA 50011-1204, USA
4. Department of Child Development and Family Science, NDSU Dept. 2615, P.O. Box 6050, 283G EML Hall, North Dakota State University, Fargo, ND 58105-6050, USA