Management, always important in all spheres of economic activity, has never been of such critical significance as today, as it plays a significant role in all sphere of economic activity. Explain - download a 4shared. Management, always important in all spheres of economic activity, has never been of such critical significance as today, as it plays a significant role in all sphere of economic activity. Explain è ospitata presso il servizio di condivisione gratuita di file 4shared.