全文获取类型
收费全文 | 3404篇 |
免费 | 794篇 |
国内免费 | 1篇 |
专业分类
管理学 | 788篇 |
民族学 | 13篇 |
人口学 | 116篇 |
丛书文集 | 2篇 |
理论方法论 | 666篇 |
综合类 | 5篇 |
社会学 | 2233篇 |
统计学 | 376篇 |
出版年
2023年 | 4篇 |
2021年 | 70篇 |
2020年 | 151篇 |
2019年 | 316篇 |
2018年 | 153篇 |
2017年 | 234篇 |
2016年 | 282篇 |
2015年 | 269篇 |
2014年 | 259篇 |
2013年 | 477篇 |
2012年 | 208篇 |
2011年 | 211篇 |
2010年 | 173篇 |
2009年 | 133篇 |
2008年 | 169篇 |
2007年 | 122篇 |
2006年 | 148篇 |
2005年 | 105篇 |
2004年 | 113篇 |
2003年 | 98篇 |
2002年 | 79篇 |
2001年 | 74篇 |
2000年 | 63篇 |
1999年 | 22篇 |
1998年 | 10篇 |
1997年 | 15篇 |
1996年 | 22篇 |
1995年 | 8篇 |
1994年 | 12篇 |
1993年 | 15篇 |
1992年 | 19篇 |
1991年 | 16篇 |
1990年 | 11篇 |
1989年 | 13篇 |
1988年 | 11篇 |
1987年 | 9篇 |
1986年 | 6篇 |
1985年 | 8篇 |
1984年 | 6篇 |
1983年 | 10篇 |
1982年 | 10篇 |
1981年 | 11篇 |
1979年 | 10篇 |
1978年 | 6篇 |
1976年 | 7篇 |
1975年 | 3篇 |
1974年 | 4篇 |
1971年 | 3篇 |
1969年 | 3篇 |
1967年 | 3篇 |
排序方式: 共有4199条查询结果,搜索用时 125 毫秒
991.
While theory suggests that information programs may correct market failures and improve welfare, the empirical impacts of these policies remain undetermined. We show that mandatory disclosure programs in the electricity industry achieve stated policy goals. We find that the proportion of fossil fuels decreases, and the proportion of clean fuels increases in response to disclosure programs. However, the programs may produce unintended consequences. For example, programs may make “clean” firms cleaner, while leaving “dirty” firms relatively unchanged. If the marginal benefits of pollution abatement are larger at dirty firms than at clean firms, disclosure programs may induce inefficient abatement allocations. (JEL D83, Q58, D21) 相似文献
992.
Existing ethical discussion considers the differences in care for identified versus statistical lives. However, there has been little attention to the different degrees of care that are taken for different kinds of statistical lives. Here we argue that for a given number of statistical lives at stake, there will sometimes be different, and usually greater, care taken to protect predictable statistical lives, in which the number of lives that will be lost can be predicted fairly accurately, than for unpredictable statistical lives, where the lives are at stake because of a low‐probability event, such that most likely no one will be affected by the decision but with low probability some lives will be at stake. One reason for this difference is the statistical challenge of estimating low probabilities, and in particular the tendency of common approaches to underestimate these probabilities. Another is the existence of rational incentives to treat unpredictable risks as if the probabilities were lower than they are. Some of these factors apply outside the pure economic context, to institutions, individuals, and governments. We argue that there is no ethical reason to treat unpredictable statistical lives differently from predictable statistical lives. Moreover, lives that are unpredictable from the perspective of an individual agent may become predictable when aggregated to the level of a societal decision. Underprotection of unpredictable statistical lives is a form of market failure that may need to be corrected by altering regulation, introducing compulsory liability insurance, or other social policies. 相似文献
993.
Karine Torosyan Theodore P. Gerber Pilar Goñalons‐Pons 《The International migration review》2016,50(2):445-474
We examine whether migration affects the gender division of household tasks and participation in leisure within origin‐country households using survey data from the Republic of Georgia. Our theoretical framework identifies two sets of mechanisms whereby migration might influence gender differences in home activities: migrant experience effects and migrant absence effects. We test for both types of effects on the probability that men and women perform gender atypical household tasks and engage in leisure activities by comparing households with and without currently absent and return migrants using probit regressions. We find evidence for both migration absence and migration experience effects on gender differences in housework and leisure. However, these effects are complex and contradictory: Generally, male migration tends to exacerbate gender differences in the sending household while female migration tends to ameliorate them. 相似文献
994.
This paper introduces several theoretical constructs drawn from the work of Humberto Maturana that can be applied to a diverse range of clinical contexts, including supervision. These constructs are: love as a fundamental need of human beings; pathways of explanation: (Objectivity), Objectivity; Emotioning; Structural Coupling; Plasticity; Domains of Operational Coherences. These constructs assist in choosing a point of entry for specific clinical situations and form a foundation on which one's preferred model of practice can be built. 相似文献
995.
Justin Lin Ha‐Joon Chang 《Development policy review : the journal of the Overseas Development Institute》2009,27(5):483-502
This is the first in an occasional series of DPR Debates, designed to illuminate specific issues of international development policy. Each debate will bring together two well‐known researchers or practitioners, giving them the opportunity, over three rounds, to test and challenge each other's ideas. The debates are intended to be robust but accessible, rooted in rigorous research but useful to the wide readership of Development Policy Review. 相似文献
996.
Unlike states in Europe, East Asia settles very few migrants and has not developed a European‐style multicultural society. We seek to explain this variation using comparative analysis of two of the most advanced states in East Asia, South Korea and Japan, with several states in Europe. Focusing on family reunification – almost always the precursor to migrant settlement – we examine the effects of several independent variables, including supranational institutions, independent courts, interest groups, political culture, and the perceptions of migrants. We conclude that both Korea and Japan have less migrant settlement because of the lack of regional institutions pushing for family reunification rights, an elite political culture that still maintains the assumptions and repertoires of a “developmental state,” where rights may be sacrificed for economic growth and order, and migrant perceptions of greater immigration control in Asia. 相似文献
997.
998.
Four experiments investigated infants' preferences for age‐appropriate and age‐inappropriate infant‐directed speech (IDS) over adult‐directed speech (ADS). Two initial experiments showed that 6‐, 10‐, and 14‐month‐olds preferred IDS directed toward younger infants, and 4‐, 8‐, 10‐, and 14‐month‐olds, but not 6‐month‐olds, preferred IDS directed toward older infants. In Experiment 3. 6‐month‐olds preferred IDS directed toward older infants when the frequency of repeated utterances matched IDS to younger infants. In Experiment 4, 6‐month‐olds preferred repeated IDS utterances over the same IDS utterances organized without repetition. Attention to repeated utterances precedes word segmentation and sensitivity to statistical cues in continuous speech, and might play a role in the discovery of these and other aspects of linguistic structure. 相似文献
999.
This study examined (a) growth curves of youth participation in sports, performance and fine arts, and youth clubs throughout the high school years and (b) the associations between a series of predictors and the initial participation rates and growth over time. The predictors included individual, friend, and family factors. The moderating effect of youths' gender was also examined. Study participants were 272 youths (55% girls, Mage=12.4 years) and their parents. The predictors were assessed in Grade 6 and were based on reports by youths, parents, teachers, and classmates. Participation in organized activities was assessed annually from Grades 7 to 10. Altogether, the findings revealed that participation in sports, performance and fine arts, and youth clubs remains stable across the high school years. However, interindividual differences were found in the participation growth curves. This variation was predicted by individual, friend, and family factors, mostly with respect to sports activities. 相似文献
1000.