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The effects of unit non-response on survey errors are of great concern to researchers.However, direct assessment of non-response bias in survey estimates is rarely possible.Attempts are often made to adjust for the effects of non-response by weighting, but thisusually relies on the use of frame data or external population data, which are at bestmodestly correlated with the survey variables. This paper reports the development ofa method to collect limited survey data from non-respondents to personal interviewsurveys and a large-scale field test of the method on the British Crime Survey (BCS).The method is shown to be acceptable and low cost, to provide valid data, and to haveno detrimental effect on the main survey. The use of the resultant data to estimatenon-response bias is illustrated and some substantive conclusions are drawn for the BCS. 相似文献
3.
Lynn Hodgkinson 《Journal of Business Finance & Accounting》2001,28(7&8):943-961
Analysts' ability to forecast earnings per share has been the subject of considerable debate. A concern highlighted in previous research is the agency problem which may arise when analysts have a close working relationship with the firms for which they are providing forecasts. This paper provides evidence that this relationship does not improve the accuracy of the earnings forecasts, but stimulates optimistic forecasts. In addition, the paper examines whether firm size is a factor in forecast accuracy or bias. 相似文献
4.
It is well documented that share prices on ex-dividend days drop by less than the value of the dividends paid. However, the explanations offered to date remain inconclusive. This study examines the behaviour of share prices on ex-dividend days using data from the UK after the introduction of the 1988 Income and Corporation Taxes Act. Following [10] we sub-divide the data conditional on the size of the dividend paid. We find that for the large dividend sub-sample, when the impact of market micro-structure is taken into account, the ex-dividend price drop is not significantly different to the value of the dividend paid. 相似文献
5.
The patterns of daily returns in over-the-counter (OTC) stocks are examined to determine if a holiday effect exists in the OTC market. For the sample period of 1973–1989, test results provide evidence of unusually high returns on pre-holiday trading days and unusually low returns on post-holiday trading days in the OTC market. Additional analyses indicate that other documented calendar anomalies do not cause the pre-holiday effect, but the day-of-the-week effect apparently drives the post-holiday effect. 相似文献
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RalfGeibenLynn 《中国科技投资》2004,(6):54-54
I see a big growth potential for the US and Chinese biotechnology partnerships for the next years. US biotechnology sector is generating already more than $50 billion dollars. Chinese bio-technology will grow in the next 20 years to more than 11 billion yuan (US 1.33 billion) annually. 相似文献
8.
This paper derives the shadow prices of labour and capital to be used in the public sector in a situation of unemployment. The setting considered is that of a three-good, two-period general equilibrium model. Then shadow prices are compared to their corresponding market prices and shown to closely depend on own and cross-elasticities of supply and demand for labour and investment. In the first part, a rigid wage rate is the sole source of distortion; then, a tax on capital income is introduced so that our formula for the social rate of discount can be contrasted with that of Harberger, Sandmo and Drèze. 相似文献
9.
Robin Boadway Nicolas Marceau Maurice Marchand 《International Tax and Public Finance》1996,3(3):311-327
This paper analyzes some of the problems that arise in decentralizing education to the private sector. We concentrate on the difficulties that result from the heterogeneity of students and competition among schools in a location setting. We analyze two main issues, the resources expended by schools and the mix of students in schools, and report on results for two others, the location of schools and their number. For each of these, we investigate the extent to which decentralizing the provision of schooling results in an efficient allocation of resources, and consider the use of vouchers to improve the situation. Our analysis draws on elements of three distinct methodologies: the theory of clubs, location theory, and the theory of monopolistic competition. We find that private schooling will typically be inefficient, but that inefficiency may sometimes be corrected by appropriately designed vouchers.We would like to thank Olivier Debande, Jean-François Wen, two anonymous referees, and seminar participants at the 1st meeting of the Canadian Public Economics Study Group and the 51 st congress of the International Institute of Public Finance for helpful comments. Stefan Buergi and Luc Savard provided useful research assistance. We are also grateful to the SSHRCC and the FCAR for financial support. 相似文献
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