Ivanov, Stoyu I.; Leong, Kenneth; Zaima, Janis K. - In: Economics Bulletin 34 (2014) 1, pp. 605-613
&P500 Index. We examine whether operational performance measured by net operating profits, cost of capital, and capital … the same period, and capital invested increases significantly. The results imply that firms do improve operational … performance; however, the outcome of the capital invested could be positive or negative, perhaps, explaining the mixed results …