全文获取类型
收费全文 | 19925篇 |
免费 | 359篇 |
国内免费 | 1篇 |
专业分类
管理学 | 2874篇 |
民族学 | 70篇 |
人才学 | 1篇 |
人口学 | 1968篇 |
丛书文集 | 91篇 |
教育普及 | 2篇 |
理论方法论 | 1784篇 |
现状及发展 | 1篇 |
综合类 | 271篇 |
社会学 | 9600篇 |
统计学 | 3623篇 |
出版年
2021年 | 115篇 |
2020年 | 284篇 |
2019年 | 379篇 |
2018年 | 455篇 |
2017年 | 611篇 |
2016年 | 482篇 |
2015年 | 355篇 |
2014年 | 473篇 |
2013年 | 3116篇 |
2012年 | 650篇 |
2011年 | 624篇 |
2010年 | 462篇 |
2009年 | 388篇 |
2008年 | 462篇 |
2007年 | 465篇 |
2006年 | 461篇 |
2005年 | 468篇 |
2004年 | 414篇 |
2003年 | 387篇 |
2002年 | 439篇 |
2001年 | 534篇 |
2000年 | 543篇 |
1999年 | 471篇 |
1998年 | 351篇 |
1997年 | 328篇 |
1996年 | 330篇 |
1995年 | 308篇 |
1994年 | 289篇 |
1993年 | 295篇 |
1992年 | 354篇 |
1991年 | 331篇 |
1990年 | 294篇 |
1989年 | 300篇 |
1988年 | 301篇 |
1987年 | 259篇 |
1986年 | 251篇 |
1985年 | 288篇 |
1984年 | 274篇 |
1983年 | 257篇 |
1982年 | 225篇 |
1981年 | 191篇 |
1980年 | 171篇 |
1979年 | 205篇 |
1978年 | 184篇 |
1977年 | 171篇 |
1976年 | 141篇 |
1975年 | 169篇 |
1974年 | 123篇 |
1973年 | 119篇 |
1971年 | 94篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
971.
Anthony J. Montgomery Efharis Panagopoulou Maria C.W. Peeters Wilmar B. Schaufeli 《Community, Work & Family》2009,12(4):455-471
Studies of work and family issues have used predominately between-subject cross-sectional designs. While some researchers have called for more longitudinal studies, others have suggested that a more strategic way forward for the field is the use of daily diary studies (Frone, Russell, & Cooper, 1992). This study explores different types of interference between work and non-work domains, using a diary study methodology. This study consisted of a two-week diary study among 12 Irish employees. Analysis involved a two-step procedure involving both content analysis and interpretative phenomenological analysis (IPA). Results indicated that while individuals reported strain-based and time-based interference, evidence was also found of interference concerning persistent and intrusive thoughts. Despite some limitations to the study, this paper demonstrates that diary studies represent an opportunity for researchers to explore work and non-work experiences in a sensitive and ecologically valid way. 相似文献
972.
The study assessed Israeli students’ emotional–experiential reaction and attitude to different client populations, following a week-long experience in one of five social services settings. The study provides preliminary findings regarding the implications of first year students’ experience on their emphatic skills, a subject that generally has not received adequate scholarly attention. Using a purpose-built, self-administered questionnaire, we found students’ emotional–experiential response to their experience differed by the setting in which they were placed, being lowest in the Bedouin oriented services, intermediate among those placed in juvenile correction services, and highest in mental health, adult and child disability services. Responses were independent of all other explanatory variables, including sex, cognitive ability, previous training experience and perceptual shifts concerning the population served. We discuss possible reasons for these differences.
973.
We present findings from a nonexperimental evaluation of an employment program in which both partners in young, low-income,
primarily African-American couples simultaneously participated. Mothers participating in the couples program had larger immediate
gains in employment and earnings and decreases in TANF receipt following their exit from the program relative to mothers who
received employment assistance as individuals. Fathers showed similar although weaker results. These immediate benefits appeared
to be driven by higher rates of program completion among couples’ participants. Couples in which both partners completed the
program experienced the largest quarterly earnings gains, and couples with greater earnings’ gains were more likely to still
be together one year after the program ended. Mothers’ earnings gains eroded in the two years following program completion
and many reported new pregnancies and problems with child care. We suggest directions for future programs and encourage future
studies to consider the range of mechanisms associated with a couples focus, including potential motivational benefits and
unintended consequences.
相似文献
Carolyn J. Heinrich (Corresponding author)Email: |
974.
975.
Krzysztof J. Pelc 《Transition Studies Review》2009,16(2):343-351
What can Western powers do today to ease an eventual global power shift resulting from the rise of superpowers such as China? This paper suggests that part of the answer lies in the same power-binding institutions that allowed the US to rise post WWII without threatening its allies. Continuity in the rules of the global system during a great power transition would promote stability by reducing uncertainty, as well as the extent to which material power can be used coercively. I argue that current superpowers, the EU among them, have an interest in ensuring an equitable distribution of the gains from cooperation. While distributional issues are usually treated in normative terms, they take on very real, material meaning in the context of a great power transition. With this in mind, I look at three aspects of the current global institutional framework that would benefit from reform: international trade and aid, institutional design, and institutional proliferation. In all three cases, a more equal distribution of the gains from institutions today increases the odds that those institutional arrangements will remain in the future. 相似文献
976.
Population Research and Policy Review - 相似文献
977.
Employment and earnings of foreign-born scientists and engineers 总被引:1,自引:1,他引:0
Espenshade Thomas J. Usdansky Margaret L. Chung Chang Y. 《Population research and policy review》2001,20(1-2):81-105
Population Research and Policy Review - 相似文献
978.
This paper examines a wide variety of forms, and full histories, of family structure to test existing theories of family
influences and identify needs for new theories. The focus is on links between childhood family structure and both completed
schooling and risk of a nonmarital birth. Using a 27-year span of panel (PSID) data for U.S. children, we find that: (a) change
is stressful, (b) timing during childhood is relevant, (c) adults other than parents are important, and (d) two more recently
studied family structures (mother-with-grandparent(s) and mother-with-stepfather) do not fit the molds of existing theories.
The findings suggest that new theories should consider allocation of resources and reasons people group into family structures.
Received: 11 September 1998/Accepted: 27 March 2000 相似文献
979.
Carroll KJ 《Pharmaceutical statistics》2006,5(4):283-293
In oncology, it may not always be possible to evaluate the efficacy of new medicines in placebo-controlled trials. Furthermore, while some newer, biologically targeted anti-cancer treatments may be expected to deliver therapeutic benefit in terms of better tolerability or improved symptom control, they may not always be expected to provide increased efficacy relative to existing therapies. This naturally leads to the use of active-control, non-inferiority trials to evaluate such treatments. In recent evaluations of anti-cancer treatments, the non-inferiority margin has often been defined in terms of demonstrating that at least 50% of the active control effect has been retained by the new drug using methods such as those described by Rothmann et al., Statistics in Medicine 2003; 22:239-264 and Wang and Hung Controlled Clinical Trials 2003; 24:147-155. However, this approach can lead to prohibitively large clinical trials and results in a tendency to dichotomize trial outcome as either 'success' or 'failure' and thus oversimplifies interpretation. With relatively modest modification, these methods can be used to define a stepwise approach to design and analysis. In the first design step, the trial is sized to show indirectly that the new drug would have beaten placebo; in the second analysis step, the probability that the new drug is superior to placebo is assessed and, if sufficiently high in the third and final step, the relative efficacy of the new drug to control is assessed on a continuum of effect retention via an 'effect retention likelihood plot'. This stepwise approach is likely to provide a more complete assessment of relative efficacy so that the value of new treatments can be better judged. 相似文献
980.