TY JOUR TI Transformation of conceptual and theoretical approaches to managing jewelry holdings in the context of digitalization KW jewelry holding KW vertical integration KW digital economy KW neo-institutionalism KW post-Keynesianism KW transaction cost theory KW capital concentration theory KW risk theory KW ecosystem approach KW dynamic ability theory KW institutions KW economic relations JO Russian Journal of Management AU Grabova, O.N. AU Suglobov, A.E. AU Vahradyan, T.A. PY 2026 IS 14 PB Publishing Center RIOR