- Distinguished Visiting Professor
1980 - present: Professor of Linguistics, Dept. Romance Languages, University of Hamburg.
1973-1980: Associate Professor, University of Wuppertal.1971-1972: post-doctoral fellow, UC San Diego, Linguistics.
1973: post-doctoral fellow, U Massachusetts, Amherst, Linguistics. 1970-1971 Assistant Professor, U Frankfurt.University Education: Tübingen, Madrid, Frankfurt/Main.
Visiting professor at various universities and institutes in Brazil, Germany, Italy, Netherlands, Spain, USA & Yugoslavia.
Supervising: 21 successfully completed doctoral theses. M.A. theses. External member on Ph.D. committees: Various universities in Australia, Brazil, Canada, Spain, Sweden, USA.
Research grants: since 1979. Currently: * Simultaneous and Successive Acquisition of Bilingualism (1999-2008), German Science Foundation. * Multilingualism as Cause and Effect of Language Change: Historical Syntax of Romance Languages (1999-2008), German Science Foundation.
I am serving as editor of the journal Bilingualism: Language and Cognition (Cambridge University Press).
