全文获取类型
收费全文 | 18960篇 |
免费 | 134篇 |
国内免费 | 2篇 |
专业分类
管理学 | 2856篇 |
民族学 | 117篇 |
人口学 | 3141篇 |
丛书文集 | 27篇 |
理论方法论 | 1245篇 |
综合类 | 383篇 |
社会学 | 8679篇 |
统计学 | 2648篇 |
出版年
2020年 | 94篇 |
2019年 | 127篇 |
2018年 | 1802篇 |
2017年 | 1839篇 |
2016年 | 1224篇 |
2015年 | 154篇 |
2014年 | 196篇 |
2013年 | 1457篇 |
2012年 | 508篇 |
2011年 | 1350篇 |
2010年 | 1200篇 |
2009年 | 955篇 |
2008年 | 1021篇 |
2007年 | 1191篇 |
2006年 | 212篇 |
2005年 | 419篇 |
2004年 | 421篇 |
2003年 | 360篇 |
2002年 | 258篇 |
2001年 | 171篇 |
2000年 | 202篇 |
1999年 | 164篇 |
1998年 | 148篇 |
1997年 | 132篇 |
1996年 | 169篇 |
1995年 | 144篇 |
1994年 | 156篇 |
1993年 | 146篇 |
1992年 | 154篇 |
1991年 | 166篇 |
1990年 | 182篇 |
1989年 | 155篇 |
1988年 | 176篇 |
1987年 | 150篇 |
1986年 | 143篇 |
1985年 | 150篇 |
1984年 | 157篇 |
1983年 | 148篇 |
1982年 | 116篇 |
1981年 | 95篇 |
1980年 | 97篇 |
1979年 | 125篇 |
1978年 | 105篇 |
1977年 | 83篇 |
1976年 | 86篇 |
1975年 | 59篇 |
1974年 | 86篇 |
1973年 | 56篇 |
1971年 | 47篇 |
1970年 | 47篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
81.
Gallup macropartisanship varies more over time than aggregatemeasures of partisanship employing the standard Michigan SurveyResearch Center (SRC) party identification measure, but previousanalyses do not provide direct evidence about why Gallup macropartisanshipis more variable. Although these differences could result fromthe short-term focus of the Gallup party affiliation question,aggregate-level analyses cannot test the effects of questionwording directly. Between March and October 1992, we conducteda series of question-wording experiments, employing six statewidecomputer-assisted telephone interview (CATI) surveys of Michiganadults, including a four-wave panel study. Our analyses stronglysuggest that the Gallup measure responds more to short-termpolitical conditions and clearly demonstrate that the Gallupmeasure is less stable over time. These individual-level resultshelp explain why Gallup macropartisanship varies more over timethan aggregate measures of partisanship employing the standardSRC measure and raise questions about the degree to which onecan generalize from analyses using the Gallup data to the researchliterature on party identification. 相似文献
82.
83.
84.
Russia’s role in ‘animation’ of the Kyoto Protocol was crucial. Its initial vacillation on ratification was predominantly
due to political bargaining with the EU. Domestic economic rationales [i.e. impacts of emission trading and Joint Implementation
(JI) projects] were important to a much lesser extent and environmental motives did not seem to play any role in the decision.
Since the Protocol entered into force, there have been significant delays in complete establishment of policy implementation
frameworks, which are necessary for Russia to start benefiting from JI and emission trading. Only recently, in 2007, have
GHG inventories and a national registry been established and the responsibilities for implementation of the Protocol and JI
among the government departments have been distributed only to a certain extent. Some constraints hindering JI projects, such
as vague legislation, an unfavourable economic climate, lack of commitment to JI projects, corruption, xenophobia, state and
agency ‘capture’ still remain.
相似文献
85.
Laura Bernardi Andreas Klärner Holger von der Lippe 《Revue europeenne de demographie》2008,24(3):287-313
This article contributes to the ongoing debate on the economic determinants of fertility behavior by addressing the role of
job insecurity in couples’ intentions concerning parenthood and its timing. It starts from the hypothesis that cultural values
moderate individuals’ reactions to job insecurity and the way it is related to family formation. With a systematic thematic
content analysis of a set of semi-structured interviews with childless men and women around the age of 30 in eastern and western
Germany, we are able to show that there are substantial differences in the consequences of job insecurity on intentions to
have a first child. In western Germany, a relatively secure job career is expected to precede family formation, and this sequence
of transitions is rather rigid, whereas in eastern Germany job security and family formation are thought of and practiced
as parallel investments. We suggest that the lack of convergence in family formation patterns between eastern and western
Germany after the unification of the country in 1990 is partially related to different attitudes toward job insecurity in
the two contexts. 相似文献
86.
87.
This paper proposes an experimental test to evaluate the performance of the serial cost sharing rule, originally proposed
by Shenker [Sigmetrics, 241–242 (1990)] and then analyzed by Moulin and Shenker [Econometrica 60, 1009–1037 (1992)]. We report
measures of the performance and efficiency of the serial mechanism by comparing the choices and payoffs attained by the subjects
to the expected equilibrium allocations. Experimental evidence shows that learning is needed for the subjects to converge
to the equilibrium strategy. However, in terms of efficiency, the serial mechanism leads to almost efficient allocations. 相似文献
88.
89.
90.