全文获取类型
收费全文 | 3548篇 |
免费 | 132篇 |
国内免费 | 49篇 |
专业分类
管理学 | 334篇 |
民族学 | 21篇 |
人口学 | 63篇 |
丛书文集 | 269篇 |
理论方法论 | 106篇 |
综合类 | 1593篇 |
社会学 | 151篇 |
统计学 | 1192篇 |
出版年
2024年 | 2篇 |
2023年 | 17篇 |
2022年 | 38篇 |
2021年 | 40篇 |
2020年 | 59篇 |
2019年 | 90篇 |
2018年 | 109篇 |
2017年 | 123篇 |
2016年 | 118篇 |
2015年 | 106篇 |
2014年 | 183篇 |
2013年 | 490篇 |
2012年 | 279篇 |
2011年 | 212篇 |
2010年 | 198篇 |
2009年 | 150篇 |
2008年 | 172篇 |
2007年 | 217篇 |
2006年 | 171篇 |
2005年 | 165篇 |
2004年 | 168篇 |
2003年 | 165篇 |
2002年 | 129篇 |
2001年 | 94篇 |
2000年 | 64篇 |
1999年 | 34篇 |
1998年 | 25篇 |
1997年 | 26篇 |
1996年 | 13篇 |
1995年 | 8篇 |
1994年 | 13篇 |
1993年 | 6篇 |
1992年 | 14篇 |
1991年 | 7篇 |
1990年 | 5篇 |
1989年 | 5篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1977年 | 1篇 |
排序方式: 共有3729条查询结果,搜索用时 15 毫秒
71.
In this paper, we propose a new full iteration estimation method for quantile regression (QR) of the single-index model (SIM). The asymptotic properties of the proposed estimator are derived. Furthermore, we propose a variable selection procedure for the QR of SIM by combining the estimation method with the adaptive LASSO penalized method to get sparse estimation of the index parameter. The oracle properties of the variable selection method are established. Simulations with various non-normal errors are conducted to demonstrate the finite sample performance of the estimation method and the variable selection procedure. Furthermore, we illustrate the proposed method by analyzing a real data set. 相似文献
72.
刘爽 《辽宁大学学报(哲学社会科学版)》2014,42(6):172-175
心理现实主义以客观的现实世界为基础,通过心理分析和心理描写来展示人物的内心世界,以表达社会秩序和人的行为的客观性、理性的思想。艾丽丝·门罗的作品,透过男性与女性在社会空间中的性别回归,男性和女性在生活中的行为理性回归,体现了心理现实主义的思想。 相似文献
73.
构建澜湄国家命运共同体是中国周边外交和亚洲命运共同体构想的具体实践,将助力东盟共同体建设,促进次区域稳定和繁荣。本文通过对澜湄命运共同体建设的意义、动因和影响因素分析,提出了澜湄命运共同体建设的路径选择。 相似文献
74.
Jouchi Nakajima 《Econometric Reviews》2017,36(5):546-562
Multivariate stochastic volatility models with skew distributions are proposed. Exploiting Cholesky stochastic volatility modeling, univariate stochastic volatility processes with leverage effect and generalized hyperbolic skew t-distributions are embedded to multivariate analysis with time-varying correlations. Bayesian modeling allows this approach to provide parsimonious skew structure and to easily scale up for high-dimensional problem. Analyses of daily stock returns are illustrated. Empirical results show that the time-varying correlations and the sparse skew structure contribute to improved prediction performance and Value-at-Risk forecasts. 相似文献
75.
王充 《中国人民大学学报》2012,(3):134-142
在问题类型划分方法的视野下,犯罪概念问题应该属于纯粹刑法学问题中的解释选择问题,但刑法学界以往有关犯罪概念的讨论却大多将其作为刑法问题中的价值判断问题。由于未能妥当确定犯罪概念的问题类型,从而使学界有关犯罪概念的讨论未能达成最低限度的学术共识。作为纯粹刑法学问题中的解释选择问题,形式与实质相结合的混合犯罪概念不存在被替代的必要性,而犯罪概念也不应被规定在刑法典中。 相似文献
76.
《Journal of Statistical Computation and Simulation》2012,82(2):235-250
In this paper, we investigate the selecting performances of a bootstrapped version of the Akaike information criterion for nonlinear self-exciting threshold autoregressive-type data generating processes. Empirical results will be obtained via Monte Carlo simulations. The quality of our method is assessed by comparison with its non-bootstrap counterpart and through a novel procedure based on artificial neural networks. 相似文献
77.
《Journal of Statistical Computation and Simulation》2012,82(2-3):107-117
A hierarchical Bayesian approach to ranking and selection as well as estimation of related means in two—way models is considered. Using the method of Monte Carlo simulation with importance sampling, we are able to carry out efficiently the three or four dimensional integrations as needed. An example is included to illustrate the methodology. 相似文献
78.
Ridhi Kashyap 《Population studies》2019,73(1):57-78
I examine whether prenatal sex selection has substituted postnatal excess female mortality by analysing the dynamics of child sex ratios between 1980 and 2015 using country-level life table data. I decompose changes in child sex ratios into a ‘fertility’ component attributable to prenatal sex selection and a ‘mortality’ component attributable to sex differentials in postnatal survival. Although reductions in numbers of excess female deaths have accompanied increases in missing female births in all countries experiencing the emergence of prenatal sex selection, relative excess female mortality has persisted in some countries but not others. In South Korea, Armenia, and Azerbaijan, mortality reductions favouring girls accompanied increases in prenatal sex selection. In India, excess female mortality was much higher and largely stable as prenatal sex selection emerged, but slight reductions were seen in the 2000s. In China, although absolute measures showed reductions, relative excess female mortality persisted as prenatal sex selection increased. 相似文献
79.
Martin Huber 《Econometric Reviews》2014,33(8):869-905
Sample selection and attrition are inherent in a range of treatment evaluation problems such as the estimation of the returns to schooling or training. Conventional estimators tackling selection bias typically rely on restrictive functional form assumptions that are unlikely to hold in reality. This paper shows identification of average and quantile treatment effects in the presence of the double selection problem into (i) a selective subpopulation (e.g., working—selection on unobservables) and (ii) a binary treatment (e.g., training—selection on observables) based on weighting observations by the inverse of a nested propensity score that characterizes either selection probability. Weighting estimators based on parametric propensity score models are applied to female labor market data to estimate the returns to education. 相似文献
80.
徐彦秋 《南京理工大学学报(社会科学版)》2014,(3):90-92
高校是重要的人才生产基地,必须根据社会的需求,对人才资源进行合理的配置。大学毕业生供给与人才市场竞争的局面给大学毕业生的职业指导工作带来了巨大的困难和严峻挑战。如何提高学生的综合素质和职业竞争力已经成为社会关注的热点,高校应当充分利用自身的人才资源优势,做好毕业生的职业指导工作,从而为社会提供高素质的优秀人才。 相似文献