In his teaching he espoused the use of what were at the time increasingly accepted concepts of human capital and rates of return to examine the nature and extent of private and public investments in education and training, in both market and command economies.
The book sounded a powerful call for the application of positivist methods in comparative education studies.
Library of Congress Numbers, respectively, 69-11406 and 69-17349 Reviews of National Policies for Education:Germany (Paris:Organisation for Economic Development and Cooperation, 1972) (with A.H. Passow, Max A. Eckstein and John Mallea) The National Case Study: An Empirical Comparative Study of Twenty-One Educational Systems.
International Studies in Evaluation VII (Almqvist and Wiksell, 1976) Reviews of National Policies for Education: Canada (Paris:Organisation for Economic Development and Cooperation, 1979) (with Joel Sherman) Educational Financing and Policy Goals for Primary Schools: General Report (Paris:Organisation for Economic Development and Cooperation, 1979) The following were co-authored with Max A. Eckstein: International Study of Business/Industry Involvement in Education (New York: Institute of Philosophy and Politics of Education, Teachers College, Columbia University, 1987) Examinations: Comparative and International Studies (Oxford: Pergamon Press, 1992) ISBN 0-08-041031-6 Secondary School Examinations: International Perspectives on Policies and Practice (New Haven: Yale University Press, 1993).
Gumbert ed., Patriarchy, Party, Population, and Pedagogy (Atlanta, GA: Georgia State University, 1986) "General education in the modern university," in Hermann Röhrs ed., Tradition and Reform of the University in International Perspective (Frankfurt-am-Main: Peter Lang, 1987) (with John Middleton) China's Vocational and Technical Training (The World Bank, 1988) (with Max Eckstein) "Dependency Theory in Comparative Education: Twelve Lessons from the Literature," in J. Schriewer ed., Theories and Methods in Comparative Education (Frankfurt-am-Main: Peter Lang, 1988) (with Max Eckstein) "Tradeoffs in Examination Policies: An International Comparative Perspective," Oxford Review of Education 15:1 1989 "Forms and Functions of Secondary-School Leaving Examinations," Comparative Education Review 33:3 1989 "An International Perspective on National Standards," Teachers College Record 91:1 1989 "Bildungspolitik und Internationale Studien zum Bildungswesen," Bildung und Erziehung 44:1 1991.