In 1991, the Ekonomski Institute Beograd published a book, in the Serbo-Croatian language, which Hanke and Schuler co-authored. The book laid out the details about what would have been a Yugoslav currency board. However, these efforts were suspended when the Yugoslav civil war broke out and Pregl resigned in June 1991. After the war broke out, Hanke continued his involvement in the Balkans, working with Deloitte & Touche's Eastern European division to establish new Deloitte offices and bring traditional financial accounting to the formerly Communist country.