1. International Ph. D. program in Agricultural Economics, Bioeconomy and Sustainable Food Systems –IPPAE, Justus-Liebig-Universität Gießen, Gießen, Germany
2. Department of Consumer Research, Communication and Food Sociology, Justus-Liebig-Universität Gießen, Gießen, Germany
3. Department of Civil and Environmental, Universidad de la Costa, Barranquilla, Colombia