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The investment performance of a Canadian portfolio of Canadian public real estate companies is analyzed over the period 1971–79. Using Sharpe's index of performance, it would appear at first sight that this portfolio exhibited remarkable superior performance. Moreover, this conclusion is not due to some peculiarity of the Sharpe measure: results using Treynor's measure suggest a similar conclusion. We then apply the significance tests recently recommended by Jobson and Korkie (1981). When their preferred test is applied, we are unable to reject the null hypothesis that the real estate portfolio did not exhibit superior investment performance. This result illustrates the necessity of performing adequate statistical significance tests whenever investment performance is being evaluated. 相似文献
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Roy Rothwell 《Technological Forecasting and Social Change》1980,17(1):7-34
Data is presented on the impact of government regulation on the rate and direction of innovation in U.S. manufacturing and industry. Regulation has forced some innovation, be it compliance, but in most cases it has not stimulated radical technical change. Overall, evidence suggests that the impact of regulation on business innovation has been negative and that regulation has delayed and even prevented innovation in a number of areas. 相似文献
135.
Roch Ouellet Jacques Roy Claude Cardinal Yves Rosconi 《Journal of Operations Management》1982,3(1):49-55
This paper describes a successful application of classical inventory theory at a drug manufacturing plant located in Montreal that has resulted in annual savings in the order of $110,800 and assisted management in its decision to invest in larger production equipment. The basic assumptions underlying EOQ models are reviewed and dealt with. For instance, an algorithm was devised to handle the peaks in the demand of many A class items. Following the implementation of this algorithm, buffer stocks were reduced signifi cantly while maintaining the same high levels of service. 相似文献
136.
Jock R. Anderson Roy A. Powell 《The Australian journal of agricultural and resource economics》1973,17(1):1-16
Economics of size is an important but relatively neglected aspect of Australian agriculture. The theory and methodology for analysis of economics of size are summarized and a survey made of evidence for Australian agricultural industries. The conclusion is reached that economies of size exist, particularly for small to medium farms and diseconomies appear to be absent. Further research is needed and some important areas are indicated. 相似文献
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