全文获取类型
收费全文 | 15296篇 |
免费 | 234篇 |
国内免费 | 3篇 |
专业分类
管理学 | 2108篇 |
民族学 | 70篇 |
人口学 | 1308篇 |
丛书文集 | 52篇 |
理论方法论 | 1306篇 |
综合类 | 201篇 |
社会学 | 6730篇 |
统计学 | 3758篇 |
出版年
2023年 | 89篇 |
2021年 | 80篇 |
2020年 | 215篇 |
2019年 | 333篇 |
2018年 | 348篇 |
2017年 | 516篇 |
2016年 | 359篇 |
2015年 | 272篇 |
2014年 | 368篇 |
2013年 | 2860篇 |
2012年 | 450篇 |
2011年 | 422篇 |
2010年 | 343篇 |
2009年 | 329篇 |
2008年 | 404篇 |
2007年 | 383篇 |
2006年 | 367篇 |
2005年 | 319篇 |
2004年 | 281篇 |
2003年 | 254篇 |
2002年 | 299篇 |
2001年 | 371篇 |
2000年 | 351篇 |
1999年 | 315篇 |
1998年 | 253篇 |
1997年 | 244篇 |
1996年 | 222篇 |
1995年 | 196篇 |
1994年 | 214篇 |
1993年 | 217篇 |
1992年 | 252篇 |
1991年 | 242篇 |
1990年 | 236篇 |
1989年 | 206篇 |
1988年 | 189篇 |
1987年 | 199篇 |
1986年 | 186篇 |
1985年 | 168篇 |
1984年 | 200篇 |
1983年 | 164篇 |
1982年 | 159篇 |
1981年 | 111篇 |
1980年 | 147篇 |
1979年 | 163篇 |
1978年 | 118篇 |
1977年 | 129篇 |
1976年 | 107篇 |
1975年 | 129篇 |
1974年 | 104篇 |
1972年 | 83篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
22.
23.
24.
Donald W. K. Andrews 《Econometric Reviews》1993,12(2):183-216
This paper discusses some uses in econometrics of empirical process theory for dependent rendom variables. Examples considered include non-standard parametric hypotheses tests and semiparametric estimation. The application of bracketing functional limit results is discussed in some detail 相似文献
25.
Michael H. LeRoy 《Journal of Labor Research》1992,13(4):371-379
One hundred and sixty-four elite union leaders in the United States completed a survey to assess the condition of the American
labor movement and the factors affecting it. The respondents included high-level international union and state federation
officers, central labor presidents, and 58 shop stewards. This study compares the responses of these labor officials and finds
that they have similar, negative assessments of the condition of the American labor movement. The study also finds that these
leaders agree that the most important factors affecting the labor movement are collective bargaining rights, union leadership,
union member solidarity, and the NLRB. 相似文献
26.
We consider the assessment of outliers and influential observation in non-linear measurement error models. Residuals, leverage measures and case-deletiondiagonostics are examined. The method of local influence is also applied to the models. In particular, the perturbation of measurement error variances has been found useful in assessing the adequancy of the model assumptions. A numerical example is given to illustrate the application of the diagonostics. 相似文献
27.
Bradford H. Gray 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》1993,4(2):210-220
Conclusion Data systems created with one purpose inevitably have shortcomings when used for other purposes, so it is not surprising that a database compiled from informational tax returns has serious flaws when used to compile a statistical picture of the non-profit sector. The two-digit NTEE level of aggregation that is published in theAlmanac conceals many problems that appear when the IRS-based data are broken down to the three-digit level.Identification of the problems in the NTEE and in the use of the IRS data is a necessary step toward their correction. At this point, it is clear that the IRS-based numbers in theAlmanac should be regarded, at best, as rough approximations and as a starting point for additional work. My assessment of theAlmanac suggests that, at least as far as health care is concerned, the NTEE needs revision. Correcting the problems with the IRS data will be much, much more difficult.I am grateful for assistance from Steve Noga, Chris Toppe and Virginia Hodgkinson at Independent Sector. 相似文献
28.
D R Lairson R Harrist D W Martin R Ramby T A Rustin J M Swint K Harlow J Cobb 《Journal of drug education》1992,22(4):337-352
Primary care physicians are well situated to identify patients with substance abuse problems and motivate them to seek appropriate assistance, but active programs are the exception. A study in a community setting was undertaken to assess the CAGE (the first letters of key words in a series of four questions about drinking: cut down; annoyed; guilty; and eye-opener), instrument in the routine screening for alcohol problems in both new and established patients. The screening process identified subjects for a pilot evaluation of a motivational interview designed to encourage problem-solving behavior. This article focuses on the screening results and the use of the CAGE instrument. During June and July of 1990, 687 patients of two primary care physicians belonging to a large group practice were asked to complete a health questionnaire that included the CAGE. Those who responded affirmatively to at least two of the four CAGE questions were requested to participate in follow-up assessment of problems associated with alcohol and health. The type and severity of alcohol problems experienced by patients who scored positive on the CAGE are described. Prevalence of a positive score on the CAGE was 8.6 percent with males, smokers, and blue collar and unemployed persons being more likely to score positive. The positive predictive value was .68. Primarily, persons with moderate alcohol problems were identified. Results show that the CAGE instrument is a useful screening device for identifying those with mild to moderate substance abuse problems, increasing the opportunity for intervention prior to serious medical complications. The instrument is easily administered, and has demonstrated relatively high levels of sensitivity and specificity. When combined with assessment and motivational interviews, the CAGE shows promise in the secondary prevention of substance abuse and related health problems. 相似文献
29.
The CASMIN project and the American dream 总被引:1,自引:0,他引:1
30.
WILLIMACK DIANE K.; SCHUMAN HOWARD; PENNELL BETH-ELLEN; LEPKOWSKI JAMES M. 《Public opinion quarterly》1995,59(1):78-92
We conducted a randomized experiment on a face-to-face interviewsurvey in order to test the effects on response rates of a prepaidnonmonetary incentive. Results showed a statistically significantincrease in response rates, mostly through reduction in refusalrates, in the half sample that received the incentive (a gift-typeballpoint pen) as compared with a no incentive control group.The effect appears to be due to greater cooperation from incentiverecipients at the initial visit by an interviewer. Unexpectedly,the incentive group also showed a significantly higher rateof sample ineligibility, possibly due to easier identificationof vacant residences or nonexistent addresses. In addition,evidence suggests greater response completeness among respondingincentive recipients early in the interview, with no evidenceof increased measurement error due to the incentive. 相似文献