費正清
During the following years, Wagner was a Fellow at the Society for the Humanities at Cornell University (1981–1982), a Research Fellow at the John K. Fairbank Center for East Asian Research at Harvard (1984, 1986–87) and Research Linguist at the Center for Chinese Studies at Berkeley (1984–1986). He also worked as a freelance science journalist for the radio station Sender Freies Berlin. From 1973–1981, he was editor of the journal "Befreiung. Zeitschrift für Wissenschaft und Politik".