Complex sentence: Arzhevitin has studied in Germany (1992 and 1996), the USA (1993) and the Czech Republic (1994), and in 1998 received a PhD in Economics, with his thesis devoted to the problems of entrepreneurship and small business in Ukraine.
Split into simpler sentences: Arzhevitin has studied in Germany (1992 and 1996), the USA (1993) and the Czech Republic (1994). In 1998 he received a PhD in Economics, with his thesis devoted to the problems of entrepreneurship and small business in Ukraine.