1. Department of Policy Analysis and Management, and Department of Economics, Cornell University, Ithaca, NY, USA;
2. Department of Economics, Lehigh University, Bethlehem, PA, USA;
3. Nutritional Fundamentals for Health Inc., Vaudreuil-Dorion, QC, Canada;
4. Department of Nutritional Sciences, Pennsylvania State University, University Park, PA, USA;
5. Richardson Centre for Functional Foods and Nutraceuticals, University of Manitoba, Winnipeg, MB, Canada