全文获取类型
收费全文 | 20094篇 |
免费 | 367篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2842篇 |
民族学 | 79篇 |
人才学 | 1篇 |
人口学 | 1952篇 |
丛书文集 | 79篇 |
教育普及 | 2篇 |
理论方法论 | 1814篇 |
现状及发展 | 1篇 |
综合类 | 276篇 |
社会学 | 9822篇 |
统计学 | 3594篇 |
出版年
2021年 | 116篇 |
2020年 | 287篇 |
2019年 | 403篇 |
2018年 | 460篇 |
2017年 | 636篇 |
2016年 | 506篇 |
2015年 | 363篇 |
2014年 | 473篇 |
2013年 | 3145篇 |
2012年 | 660篇 |
2011年 | 644篇 |
2010年 | 476篇 |
2009年 | 398篇 |
2008年 | 470篇 |
2007年 | 482篇 |
2006年 | 482篇 |
2005年 | 464篇 |
2004年 | 432篇 |
2003年 | 407篇 |
2002年 | 441篇 |
2001年 | 531篇 |
2000年 | 547篇 |
1999年 | 479篇 |
1998年 | 346篇 |
1997年 | 321篇 |
1996年 | 330篇 |
1995年 | 310篇 |
1994年 | 294篇 |
1993年 | 307篇 |
1992年 | 357篇 |
1991年 | 330篇 |
1990年 | 291篇 |
1989年 | 297篇 |
1988年 | 295篇 |
1987年 | 257篇 |
1986年 | 247篇 |
1985年 | 284篇 |
1984年 | 272篇 |
1983年 | 256篇 |
1982年 | 224篇 |
1981年 | 186篇 |
1980年 | 169篇 |
1979年 | 195篇 |
1978年 | 178篇 |
1977年 | 164篇 |
1976年 | 137篇 |
1975年 | 157篇 |
1974年 | 119篇 |
1973年 | 115篇 |
1972年 | 93篇 |
排序方式: 共有10000条查询结果,搜索用时 12 毫秒
81.
Schervish Paul G. Havens John J. 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2002,13(1):47-71
This paper describes the theoretical foundations, empirical findings, and practical and philosophical implications of the Boston Area Diary Study (BADS), a study of the caring behavior of 44 participants over one calendar year. In particular, the paper presents an identification theory of care and discusses how it shaped the conceptualization, collection, and analysis of the data in a year-long diary study of daily voluntary assistance. The findings from the BADS (1) theoretically confirm the identification theory of care; (2) methodologically capture how individuals perceive and carry out caring behavior as a unity; and (3rpar; empirically document the existence of a moral citizenship in America that is substantially more vigorous than is implied by the usual indicators of civic and political citizenship. 相似文献
82.
John A. Eccleston Deborah J. Street 《Australian & New Zealand Journal of Statistics》1994,36(3):371-378
This paper presents an algorithm for the construction of optimal or near optimal change-over designs for arbitrary numbers of treatments, periods and units. Previous research on optimality has been either theoretical or has resulted in limited tabulations of small optimal designs. The algorithm consists of a number of steps:first find an optimal direct treatment effects design, ignoring residual effects, and then optimise this class of designs with respect to residual effects. Poor designs are avoided by judicious application of the (M, S)-optimality criterion, and modifications of it, to appropriate matrices. The performance of the algorithm is illustrated by examples. 相似文献
83.
84.
This study examines the effect of unionization, right-to-work laws, and participation of women in the labor force on income
inequality. Two distinct models are developed using 1970 and 1980 census data on the 50 states in the U.S. First, an income
inequality model is specified as a beta distribution of the second kind to estimate Gini measures of income inequality. Second,
these Gini estimates are used in a simultaneous equations model. The 1970 results indicate that higher unionization rates
decreased inequality while right-to-work laws increased inequality. In 1980, the measure of inequality was lower in states
with higher female labor force participation.
We thank an unknown referee and the editor for comments and criticisms that greatly improved the paper. The usual caveat applies. 相似文献
85.
Although surveys are extensively used in sociology, there has been a relative neglect of the effect of task definition upon results obtained. The present article examines the effects of one such task variable, length and specificity of the cue, on response sets concerning the frequency and quantity of alcohol consumed. In one survey format, respondents were asked to report the average number of days drinking per month, and the average number of drinks consumed on each of these occasions. In the second format, questions concerning the monthly frequency of alcohol consumption and quantity consumed were decomposed by twelve drinking locations. The results indicate dramatic increases both in terms of frequency and quantity between the two questionnaire formats. Implications of these results are discussed within the framework of the methodological phenomena of telescoping and the social psychological tendency to under-report threatening behaviors. 相似文献
86.
87.
UNDERSTANDING MAIL SURVEY RESPONSE BEHAVIOR A META-ANALYSIS 总被引:5,自引:0,他引:5
YAMMARINO FRANCIS J.; SKINNER STEVEN J.; CHILDERS TERRY L. 《Public opinion quarterly》1991,55(4):613-639
A meta-analysis of prior studies of techniques designed to inducemail survey response rates was conducted. Research encompassing184 effects (study outcomes) in 115 studies (articles) for 17predictors of response rate was examined. The average effectsize across all manipulations was r=.065, indicating an averageincrease of about 6.5 percent in response rates for manipulations.Effect sizes for specific predictors and two potential moderatorsof effects were examined. Results indicated that repeated contactsin the form of preliminary notification and follow-ups, appeals,inclusion of a return envelope, postage, and monetary incentives,were effective in increasing survey response rates. Significanteffect sizes for the predictors ranged from an increase in responseof 2 percent to 31 percent. Implications of the results forthe conduct of mail surveys and future research on mail surveyresponse behavior are discussed. 相似文献
88.
The multiple self-referent model (Brown-Collins & Sussewell, 1986) provides a comprehensive framework for understanding the personal, social, and historical aspects of self-concept formation in African American women and has important implications for understanding the complexity of career development issues for Black women. Excerpts from recorded interviews and autobiographical writings of four well-known African American women provide examples of the basic components of this model. Suggested interventions for career counseling with Black female clients are discussed. 相似文献
89.
90.
To reduce nonresponse bias in sample surveys, a method of nonresponse weighting adjustment is often used which consists of multiplying the sampling weight of the respondent by the inverse of the estimated response probability. The authors examine the asymptotic properties of this estimator. They prove that it is generally more efficient than an estimator which uses the true response probability, provided that the parameters which govern this probability are estimated by maximum likelihood. The authors discuss variance estimation methods that account for the effect of using the estimated response probability; they compare their performances in a small simulation study. They also discuss extensions to the regression estimator. 相似文献