Exchange Rates International Finance Copeland Pdf To DocIn some specifications, use of computers for specific tasks is associated with higher costs. Estimates of the effects of computer use on costs are larger in absolute value when the sample is restricted to manufacturing or wholesale trade firms or to larger small businesses. Estimates using the more parsimonious set of control variables widely available in other firm level data show large and positive effects of computer use on firm costs, sales, and profits, suggesting that controlling for managerial, firm, and owner characteristics is important.