全文获取类型
收费全文 | 452篇 |
免费 | 16篇 |
国内免费 | 3篇 |
专业分类
管理学 | 80篇 |
理论方法论 | 4篇 |
综合类 | 23篇 |
社会学 | 5篇 |
统计学 | 359篇 |
出版年
2024年 | 1篇 |
2023年 | 6篇 |
2022年 | 12篇 |
2021年 | 9篇 |
2020年 | 11篇 |
2019年 | 9篇 |
2018年 | 28篇 |
2017年 | 26篇 |
2016年 | 27篇 |
2015年 | 17篇 |
2014年 | 14篇 |
2013年 | 110篇 |
2012年 | 44篇 |
2011年 | 13篇 |
2010年 | 14篇 |
2009年 | 12篇 |
2008年 | 15篇 |
2007年 | 12篇 |
2006年 | 6篇 |
2005年 | 9篇 |
2004年 | 8篇 |
2003年 | 7篇 |
2002年 | 7篇 |
2001年 | 7篇 |
2000年 | 5篇 |
1999年 | 4篇 |
1998年 | 7篇 |
1997年 | 2篇 |
1996年 | 6篇 |
1995年 | 3篇 |
1994年 | 4篇 |
1993年 | 4篇 |
1990年 | 3篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 2篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1977年 | 2篇 |
排序方式: 共有471条查询结果,搜索用时 31 毫秒
51.
Jushan Bai 《Econometrica : journal of the Econometric Society》2013,81(1):285-314
We consider the estimation of dynamic panel data models in the presence of incidental parameters in both dimensions: individual fixed‐effects and time fixed‐effects, as well as incidental parameters in the variances. We adopt the factor analytical approach by estimating the sample variance of individual effects rather than the effects themselves. In the presence of cross‐sectional heteroskedasticity, the factor method estimates the average of the cross‐sectional variances instead of the individual variances. The method thereby eliminates the incidental‐parameter problem in the means and in the variances over the cross‐sectional dimension. We further show that estimating the time effects and heteroskedasticities in the time dimension does not lead to the incidental‐parameter bias even when T and N are comparable. Moreover, efficient and robust estimation is obtained by jointly estimating heteroskedasticities. 相似文献
52.
H. H. Lemmer 《统计学通讯:理论与方法》2013,42(14):1427-1438
Iman (1974) and Conover and Iman (1976) have shown by means of simulation studies that a rank transform, whereby the ordinary F-tests are applied to the ranks of the original observations in two-way experimental designs, presents a remarkably powerful method of analysis. In the present study it is shown that this rank transform is closely related to the procedure proposed by Lemmer and Stoker (1967) for the two-way analysis of variance. The main conclusions are that the Iman tests are generally slightly more powerful than those of Lemmer and Stoker, but that in the presence of interaction the latter tests for main effects are safer to use than the former because interaction tends to make the Iman tests for main effects significant even if no main effects exist. 相似文献
53.
M.L. Tlku 《统计学通讯:理论与方法》2013,42(17):2043-2051
54.
Wei-Yin Loh 《统计学通讯:理论与方法》2013,42(22):2757-2769
This paper compares the tail-heaviness of certain random quotients in terms of the asymptotic relative efficiences of the sample median to a large class of estimators containing the mean, trimmed mean and Huber's M-estimator. The random quotients are generalizations of the "Normalllndependent" distributions and include the Student's t, contaminated normal, double exponential and slash distributions. 相似文献
55.
56.
Anthony C. Atkinson 《Econometric Reviews》2013,32(1-3):21-39
The article illustrates the use of the forward search to provide robust analyses of econometric data. The emphasis is on informative plots that reveal the inferential importance of each observation. The division of observations into “good” and “bad” leverage points is shown to be potentially misleading. 相似文献
57.
Thomas R. Willemain Ali Allahverdi Philip Desautels Janine ldredge Ozden Gur Gregory Panos 《统计学通讯:模拟与计算》2013,42(4):1043-1075
We compare the performance of seven robust estimators for the parameter of an exponential distribution. These include the debiased median and two optimally-weighted one-sided trimmed means. We also introduce four new estimators: the Transform, Bayes, Scaled and Bicube estimators. We make the Monte Carlo comparisons for three sample sizes and six situations. We evaluate the comparisons in terms of a new performance measure, Mean Absolute Differential Error (MADE), and a premium/protection interpretation of MADE. We organize the comparisons to enhance statistical power by making maximal use of common random deviates. The Transform estimator provides the best performance as judged by MADE. The singly-trimmed mean and Transform method define the efficient frontier of premium/protection. 相似文献
58.
Kimmo E. E Raatikainen 《统计学通讯:模拟与计算》2013,42(1):375-390
Shapes of service-time distributions in queueing network models have a great impact on the distribution of system response-times. It is essential for the analysis of response-time distribution that the modeled service-time distributions have the correct shape. Tradionally modeling of service-time distributions is based on a parametric approach by assuming a specific distribution and estimating its parameters. We introduce an alternative approach based on the principles of exploratory data analysis and nonparametric data modeling. The proposed method applies nonlinear data transformation and resistant curve fitting. The method can be used in cases, where the available data is a complete sample, a histogram, or the mean and a set of 5-10 quantiles. The reported results indicate that the proposed method is able to approximate the distribution of measured service times so that accurate estimates for quantiles of the response-time distribution are obtained 相似文献
59.
60.
Thomas Kämpke 《Journal of Statistical Computation and Simulation》2013,83(9):1684-1703
Distance equalizers are introduced as empirical measures of central tendency that make distances to univariate data as similar as possible. These measures are made precise by means of various so-called fluctuation functions which account for distances in different ways. Distance equalizers differ from the mean as well as from the median. Also, distance equalizers relate to dispersion measures. Algorithms and closed-form solutions for special cases are given. Some computations require to perform multiextremal function minimization. Distance equalization is extendable to data from higher dimensions and to function quantization in signal processing. 相似文献