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排序方式: 共有61条查询结果,搜索用时 671 毫秒
1.
In this paper, we discuss the properties of preliminary test estimators (PTE) of the parameters of simple linear model with
measurement error (ME model) when the slope of the linear model is suspected to be zero. Expressions of the bias, MSE and
efficiencies are obtained under conditional as well as unconditional situations with known reliability coefficient. Conditional
model results are compared to the standard model without measurement error. We also provide the unconditional model analysis
in finite samples. Asymptotic theory under local alternatives is developed when the variance of measurement error or the ratio
of the variance of the model error relative to the variance of the measurement error is known. Asymptotic expressions of bias
and MSE of the estimators along with their efficiencies are obtained. In every case, it is shown that the measurement error
tend to increase the variability of the estimators compared to the estimators without measurement error. Graphs and tables
are provided to see these results and to determine optimum level of significance for minimum guaranteed efficiency.
Received October 2001
RID="*"
ID="*" A. K. Md. E. Saleh is a Distinguished Research Professor and H. M. Kim is a Ph.D. candidate in the School of Mathematics
and Statistics, Carleton University, Ottawa.
Acknowledgment. The authors gratefully acknowledge the constructive suggestion of the referees to improve the paper. The research is supported
by NSERC grant A3088. 相似文献
2.
Mohamed Saleh 《Economics of Transition》2017,25(2):149-163
This article argues that there is a need to develop a ‘new’ economic and social history of the Middle East and North Africa (MENA) region that is based on exploiting novel sources of data, including (a) primary papyrological sources from the medieval period, (b) primary sources at the region's local archives and European (colonial) archives, and (c) primary sources from the ancient (pre-Islamic) period. The proposed ‘new’ history of the MENA region must be inter-disciplinary for two reasons: (a) digitizing and employing these novel data sources in research requires the collaboration of social scientists, historians, archaeologists, anthropologists, demographers and papyrologists, as well as the co-operation of MENA-based scholars who have better access to MENA's local archives, and (b) even if these novel sources are digitized, data limitations are likely to impose a constraint on the reach of quantitative analysis and thus necessitate an inter-disciplinary methodology that combines quantitative evidence with historical analysis. 相似文献
3.
4.
Fajer Saleh Al‐Mutawa 《心理学和销售学》2013,30(3):236-246
The aim of this paper is to explore the influence of consumer‐generated representations on symbolic brand meaning. The term consumer‐generated representation is used in this research to refer to the image created for a brand based on the defining characteristics of a consumer or group of consumers. A preliminary qualitative study consisting of 12 in‐depth interviews was conducted in Kuwait, specifically exploring Muslim female consumers as consumers of western luxury fashion brands. The findings show that Muslim female consumers generate “Modestly Sexy” representations that recreate meaning for western luxury fashion brands in Kuwait. Thus, marketers need to recognize the importance of managing consumer‐generated representations on a global scale. 相似文献
5.
6.
Saleh S. Tabrizy 《Southern economic journal》2015,82(1):307-334
Multinational firms are increasingly sending their innovative tasks abroad. This article examines whether offshoring research and development, design, and engineering activities provides any gains in terms of firm‐level innovation output. The effects of trade in innovative tasks on the probability of firms being innovative and the share of innovative product sales in total turnover are examined using an instrumental variable approach. The data in use come from a recent survey, which provides cross‐section observations for more than 14,750 firms in seven European countries. The results suggest that those firms that offshore their innovative activities are 60% more likely to successfully innovate. Also, offshoring innovative activities increases the share of innovative product sales in total turnover up to 35%. Furthermore, firms in this sample appear to gain from trade in innovative tasks when such trade is in product innovation but not when such trade is in process innovation. 相似文献
7.
This study attempts to reassess the evidence on the degree of capital mobility and crowding out by applying a varying coefficients model to data on 19 OECD countries over the 1971–1999 period. Our period-specific results strongly support the crowding-out effect as well as the low capital mobility argument for this group of countries as a whole. However, the strength of the crowding-out effect appears to weaken and the degree of capital mobility to increase in the 1990s as compared to the 1970s and 1980s. We also classify countries into five groups according to the relative size of the government sector. Our group-specific results indicate that the degree of capital mobility is generally lower and the crowding-out effect generally stronger, in country groups with smaller governments. The differences are especially evident when we compare the group with largest government size with all other groups, those differences between the latter being much more modest. However, significant differences in the country-specific results suggest that it is prudent to be cautious when we draw conclusions about crowding-out and capital mobility for specific countries from the period-wise or group-wise results. This is particularly important in drawing policy implications for specific countries. 相似文献
8.
Abstract: This paper conducts a UK test of a version of the Ohlson (1995) model. We should only expect abnormal earnings to revert to zero if the book value of assets is economically meaningful. In this paper we make use of the property revaluations common in UK accounts, but estimate other asset values and earnings in inflation‐adjusted terms. This, we argue, gives rise to estimates of abnormal earnings that can reasonably be expected to revert to zero. We then test this modified model on UK data using the Dechow, Hutton and Sloan (1999) method. In line with the predictions of the Ohlson model, we find that these modified abnormal earnings appear to mean revert, and that a first order autoregressive process is sufficient to capture the persistence of UK real abnormal earnings. The modified abnormal earnings model in general predicts one year ahead earnings more successfully than an unmodified model. Furthermore, for much of the sample period, one year ahead predictions of abnormal earnings are better for the real model during periods of higher inflation. The undervaluation problem found in prior studies appears to be replaced with an overvaluation problem in the real model which is more acute during periods of high inflation. Last, we show that an estimate of the model based upon an industry level specification appears to perform no better than a market‐wide specification of the model. 相似文献
9.
Kamran Ahmed Jayne M. Godfrey Norman M. Saleh 《The International Journal of Accounting》2008,43(2):114-138
This study addresses how a stock market prices earnings components around a sudden and severe economic downturn. In particular, the study examines the market valuation of discretionary accruals for debt renegotiating Malaysian firms during the Asian financial crisis. Our analysis shows that negative discretionary accruals for debt renegotiating firms are associated with higher market values of equity and are not related to the firms' future earnings. These findings are consistent with investors placing a positive value on the probability that negative accruals increase the likelihood that concessions can be extracted from lenders during renegotiation. In contrast, discretionary accruals for a control sample of non-debt renegotiating firms are not significantly associated with stock prices but are positively associated with future earnings. 相似文献
10.
In this paper we consider some improved estimators of the intercept and slope parameters in a parallelism model with errors
belonging to a sub-class of elliptically contoured distributions. We derive the exact bias, MSE matrices and quadratic risk
expressions for these estimators. It is shown that the dominance properties of these estimators are the same as under normal
theory. Further, it is shown that the shrinkage factor of the Stein estimators is robust with respect to the regression parameters
and unknown mixing distributions. 相似文献