TY JOUR TI The impact of digital twins on the transformation of employment and staff competencies KW digital twins KW Industry 4.0 KW employment structure KW staff competencies KW human capital KW digital economy KW labor market JO Theoretical economics AU Smirnov, A.P. AU Bryzgalov, A.A. PY 2026 IS 0 PB Yaroslavl State Technical University