Institution: | 1.Warsaw School of Economics, Institute of Risk and Capital Markets, Al. Niepodleg?o?ci 162, 02-554, Warszawa, Poland ;2.Warsaw School of Economics, Institute of Finance, Al. Niepodleg?o?ci 162, 02-554, Warszawa, Poland ;3.University of Johannesburg, College of Business and Economics, PO Box 524, Auckland Park, 2006, Republic of South Africa ; |