全文获取类型
收费全文 | 182篇 |
免费 | 4篇 |
专业分类
管理学 | 32篇 |
人口学 | 16篇 |
理论方法论 | 13篇 |
综合类 | 3篇 |
社会学 | 96篇 |
统计学 | 26篇 |
出版年
2023年 | 2篇 |
2022年 | 2篇 |
2021年 | 7篇 |
2020年 | 3篇 |
2019年 | 6篇 |
2018年 | 10篇 |
2017年 | 13篇 |
2016年 | 5篇 |
2015年 | 5篇 |
2014年 | 9篇 |
2013年 | 33篇 |
2012年 | 10篇 |
2011年 | 9篇 |
2010年 | 9篇 |
2009年 | 7篇 |
2008年 | 7篇 |
2007年 | 2篇 |
2006年 | 3篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2003年 | 3篇 |
2002年 | 3篇 |
2001年 | 6篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1996年 | 3篇 |
1995年 | 5篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1983年 | 1篇 |
排序方式: 共有186条查询结果,搜索用时 703 毫秒
91.
Rafael Salas 《Social Choice and Welfare》2002,19(1):207-218
In this paper we justify the use of the between-groups S-convex relative inequality indices to measure interterritorial convergence. In addition, we provide two appealing extensions
to the use of the additive decomposable General Entropy inequality indices. First, multilevel decomposition along several
subpartitions is satisfied and a natural application to convergence decomposition along different territorial level arises.
Second, further general inequality decomposition along several dimensions is also satisfied. Thus, this framework provides
a better explanation of the determinants of convergence (and inequality) when it is decomposed into different dimensions in
comparison with other indices available in the literature.
Received: 21 May 1999/Accepted: 21 September 2000 相似文献
92.
93.
94.
Let \(\mathcal{C}\) be a uniform clutter and let A be the incidence matrix of \(\mathcal{C}\). We denote the column vectors of A by v 1,…,v q . Under certain conditions we prove that \(\mathcal{C}\) is vertex critical. If \(\mathcal{C}\) satisfies the max-flow min-cut property, we prove that A diagonalizes over ? to an identity matrix and that v 1,…,v q form a Hilbert basis. We also prove that if \(\mathcal{C}\) has a perfect matching such that \(\mathcal{C}\) has the packing property and its vertex covering number is equal to 2, then A diagonalizes over ? to an identity matrix. If A is a balanced matrix we prove that any regular triangulation of the cone generated by v 1,…,v q is unimodular. Some examples are presented to show that our results only hold for uniform clutters. These results are closely related to certain algebraic properties, such as the normality or torsion-freeness, of blowup algebras of edge ideals and to finitely generated abelian groups. They are also related to the theory of Gröbner bases of toric ideals and to Ehrhart rings. 相似文献
95.
Paula Perre Rafael D. Loyola Thomas M. Lewinsohn Mário Almeida-Neto 《Urban Ecosystems》2011,14(4):711-722
Exotic plant species very often comprise a large proportion of urban floras. Because herbivorous insects depend on the presence
of suitable host plants to maintain their populations, it is imperative to elucidate the relative importance of native and
exotic hosts to understand the response of herbivorous guilds to urbanization. By using a plant-herbivore system composed
of Asteraceae hosts and flower-head endophagous insects, we investigated whether the diversity and composition of herbivorous
insects differs between native and exotic host-plant species in an urban environment. Although we found only seven exotic
Asteraceae among the 30 species recorded, the overall abundance of exotics was considerably greater than that of native host
plants. Overall, the exotic host species supported a small subset of the herbivore assemblage found on the native ones. The
number of herbivore species per host species was significantly higher among the native plants, but we did not find a difference
in herbivore abundance. Moreover, the higher taxonomic composition of herbivores on exotic Asteraceae was reduced, being composed
of only three genera and two families from a total of 16 genera and six families of herbivores. These results provide support
for the idea that plants outside of their original geographic distribution have lower loads of enemies than phylogenetically
related native species. Our findings indicate that native host plants in urban areas play a critical role in supporting the
native herbivorous insect fauna. 相似文献
96.
97.
Daron Acemoglu James A. Robinson Rafael J. Santos 《Journal of the European Economic Association》2013,11(Z1):5-44
Many states in Latin America, Africa, and Asia lack the monopoly of violence, even though this was identified by Max Weber as the foundation of the state, and thus the capacity to govern effectively. In this paper we develop a new perspective on the establishment of the monopoly of violence. We build a model to explain the incentive of central states to eliminate nonstate armed actors (paramilitaries) in a democracy. The model is premised on the idea that paramilitaries may choose to and can influence elections. Since paramilitaries have preferences over policies, this reduces the incentives of the politicians they favor to eliminate them. We then investigate these ideas using data from Colombia between 1991 and 2006. We first present regression and case study evidence supporting our postulate that paramilitary groups can have significant effects on elections for the legislature and the executive. Next, we show that the evidence is also broadly consistent with the implication of the model that paramilitaries tend to persist to the extent that they deliver votes to candidates for the executive whose preferences are close to theirs and that this effect is larger in areas where the presidential candidate would have otherwise not done as well. Finally, we use roll‐call votes to illustrate a possible “quid pro quo” between the executive and paramilitaries in Colombia. 相似文献
98.
Esperanza Vera-Toscano Victoria Ateca-Amestoy Rafael Serrano-Del-Rosal 《Social indicators research》2006,77(2):211-243
This paper aims to contribute further research on the conceptualization of individual financial satisfaction as a particular
domain of satisfaction with life as a whole. Based on the 2003 Survey on Living Conditions and Poverty for Andalucía (Spain) and using a self-reported measure of welfare, ordered probit models are used to analyze the extent
to which individual financial satisfaction can be solely explained by income in absolute terms, or alternatively, by taking
into account the importance of relative income in its two dimensions: (1) personal aspirations as individual’s adaptation
to previous and future income levels (intra-individual comparisons), and (2) social comparisons as individual’s concern for
her peer’s income (inter-personal dependency). 相似文献
99.
Alberto Chong Rafael La Porta Florencio Lopez‐de‐Silanes Andrei Shleifer 《Journal of the European Economic Association》2014,12(2):277-299
We mailed letters to non‐existent business addresses in 159 countries (10 per country), and measured whether they come back to the return address in the United States and how long it takes. About 60% of the letters were returned, taking over six months, on average. The results provide new objective indicators of government efficiency across countries, based on a simple and universal service, and allow us to shed light on its determinants. The evidence suggests that both technology and management quality influence government efficiency, just as they do that of the private sector. 相似文献
100.