全文获取类型
收费全文 | 8167篇 |
免费 | 209篇 |
国内免费 | 1篇 |
专业分类
管理学 | 1121篇 |
民族学 | 29篇 |
人口学 | 716篇 |
丛书文集 | 31篇 |
理论方法论 | 700篇 |
综合类 | 135篇 |
社会学 | 3718篇 |
统计学 | 1927篇 |
出版年
2020年 | 115篇 |
2019年 | 173篇 |
2018年 | 168篇 |
2017年 | 258篇 |
2016年 | 176篇 |
2015年 | 156篇 |
2014年 | 181篇 |
2013年 | 1524篇 |
2012年 | 246篇 |
2011年 | 203篇 |
2010年 | 187篇 |
2009年 | 162篇 |
2008年 | 227篇 |
2007年 | 225篇 |
2006年 | 188篇 |
2005年 | 158篇 |
2004年 | 139篇 |
2003年 | 132篇 |
2002年 | 148篇 |
2001年 | 189篇 |
2000年 | 165篇 |
1999年 | 151篇 |
1998年 | 130篇 |
1997年 | 128篇 |
1996年 | 126篇 |
1995年 | 112篇 |
1994年 | 84篇 |
1993年 | 127篇 |
1992年 | 137篇 |
1991年 | 121篇 |
1990年 | 131篇 |
1989年 | 112篇 |
1988年 | 107篇 |
1987年 | 114篇 |
1986年 | 100篇 |
1985年 | 85篇 |
1984年 | 115篇 |
1983年 | 98篇 |
1982年 | 94篇 |
1981年 | 65篇 |
1980年 | 93篇 |
1979年 | 106篇 |
1978年 | 72篇 |
1977年 | 83篇 |
1976年 | 71篇 |
1975年 | 85篇 |
1974年 | 68篇 |
1973年 | 54篇 |
1972年 | 61篇 |
1971年 | 52篇 |
排序方式: 共有8377条查询结果,搜索用时 62 毫秒
821.
In this note, we report a dramatic improvement in the computational efficiency of semiparametric generalized least squares(SGLS) estimation. Computation of SGLS estimates no longer presents serious problems with data sets of moderate size. We also correct a numerical error in the standard errors of the SGLS estimates reported in our recent paper in this journal (Horowitz and Neumann, 1987). The corrected standard errors of SGLS are comparable to those we reported for quantile estimates. 相似文献
822.
The asymptotic distribution of estimators generated by the methods of moments and maximum likelihood are considered. Simple formulae are provided which enable comparisons of asymptotic relative efficiency to be effected. 相似文献
823.
The objective of the paper is to apply the statistical procedure of ridge regression to a multivariate model of criminal activity. The explanatory variables are of an economic, apprehension, and seasonal nature. The Time Shared Reactive On Line Laboratory (TROLL) computer package was used in estimating all regression coefficients and other pertinent statistics. The economic variables, which included per capita personal income, hours worked, and plant closing dummy variable, were found to be statistically related to criminal activity. In addition, police expenditures as well as the three seasonal dummy variables were statistically associated with the dependent variable. A comparison is made between the results obtained from the ordinary least squares procedure and the ridge regression approach. 相似文献
824.
L. H. Evers 《Australian Social Work》2013,66(3):11-20
Australian Marriage Guidance Councils are rarely considered avant garde. Yet contemporary emphasis on the importance of citizen participation in social service delivery programmes1 unexpectedly shows them in the vanguard of the new art of mobilizing participatory community services. For more than a quarter of a century now they have been operating as expert guides and counsellors in the difficult territory of marital therapy, mainly using staffs of part-time counsellors drawn from the general community. The magnitude of this feat of maintaining the participatory character of this community service in a potentially rich field for professional exploitation goes largely unacknowledged. It has been pointed out that the professional, “because of his status, commitment and knowledge”,2 is in most cases successful in converting citizen participation programmes into the service of his own professional interest. This has always been one of the most intractable problems of any participatory scheme. So far the Marriage Guidance Councils have stayed right on top of this problem. 相似文献
825.
An inverse regression approach to analyzing quantal response assays with one quanritative independent- variable and any number of qualitative independent variables is presented. A general factorial model ror LQC- inverted relationship and methods of testing hypotheses estimating qulitative Interest are developed. This naper provides a modified method of analysis which is easier to apply than previously existing methods. 相似文献
826.
This article presents an empirical analysis of firms' order backlogs, inventories, production, and price adjustments to unanticipated demand shocks. The data are obtained from quarterly INSEE Business Survey Tests on firms' realizations, expectations, and appraisals of some various economic variables. The analysis is based on the formulation and the estimation of a recursive system of conditional log-linear probability models. 相似文献
827.
Routine implementation of the Bayesian paradigm requires an efficient approach to the calculation and display of posterior or predictive distributions for given likelihood and prior specifi- cations. In this paper we shall review some of the analytic and numerical approaches currently available, describing in detail a numerical integration strategy based on Gaussian quadrature, and an associated strategy for the reconstruction and display of distributions based on spline techniques. 相似文献
828.
829.
In this paper, we consider noninformative priors for the ratio of variances in two normal populations. We develop first and
second order matching priors. We find that the second order matching prior matches alternative coverage probabilities up to
the second order and is also a HPD matching prior. It turns out that among the reference priors, only one-at-a-time reference
prior satisfies a second order matching criterion. Our simulation study indicates that the one-at-a-time reference prior performs
better than other reference priors in terms of matching the target coverage probabilities in a frequentist sense.
This work is supported by Korea Research Foundation Grant (KRF-2004-002-C00041). 相似文献
830.
Terry H. Wagar 《Journal of Labor Research》2001,22(4):851-862
Despite the popularity of workforce cutbacks in the 1990s, largescale empirical stud-ies at the bargaining unit level are
rare. I explore some of the consequences of per-manent work force reduction using data from both employer and union respondents.
About 56 percent of employer participants and 57 percent of local union officials reported a permanent reduction of bargaining
unit employees. In comparing bargain-ing units that experienced a permanent reduction of union members, results obtained from
both employers and union officials indicated a significant negative impact on over-all employee satisfaction and labor climate.
Additional analyses with union respon-dents revealed that the reduction of bargaining unit employees was also associated with
a higher rate of grievances and absenteeism and poorer relations between union members and their supervisors. 相似文献