His research has long focused on facilitating interdisciplinary research and teaching. He is president of the Association for Interdisciplinary Studies. Knowledge organization has become the dominant element in that research agenda, and he has authored two books and several articles that develop classifications of things studied, theories and methods applied, types of data, ethical perspectives, research practices, and relationships. He has contributed to the Integrative Levels Classification and is developing the Basic Concepts Classification. He has argued in several places for the value of a classification grounded not in disciplines but in the things we study and the relationships among these. He is working with others on a book about interdisciplinary knowledge organization. See http://www.economics.ualberta.ca/en/ FacultyandStaff/SzostakRick.aspx Szostak, Rick. Classifying for Social Diversity. Knowledge Organization. 41(2), 160-170. 32 references.