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1.
刘浩然 《北京航空航天大学学报(社会科学版)》2019,1(6):69-76, 91
遵照中介效应检验程序要求,构建敏感性工程周边居民利益满意、安全忧虑、支持度与合法感知的中介模型与相关假设。通过对494个有效样本的实证研究结果表明,敏感性工程周边居民的利益满意、合法感知对支持度具有正向的影响;安全忧虑对于支持度具有负向的影响;合法感知在利益满意与支持度之间发挥了显著的不完全中介效应;合法感知在安全忧虑与支持度之间不发挥显著的中介效应。敏感性工程社会稳定风险评估着眼于对民众在利益、安全和合法三个方面的认知进行调查会更加有效。
相似文献2.
Yang Yu Zhihong Zou Shanshan Wang 《Journal of Statistical Computation and Simulation》2019,89(17):3290-3312
This paper proposes the use of the Bernstein–Dirichlet process prior for a new nonparametric approach to estimating the link function in the single-index model (SIM). The Bernstein–Dirichlet process prior has so far mainly been used for nonparametric density estimation. Here we modify this approach to allow for an approximation of the unknown link function. Instead of the usual Gaussian distribution, the error term is assumed to be asymmetric Laplace distributed which increases the flexibility and robustness of the SIM. To automatically identify truly active predictors, spike-and-slab priors are used for Bayesian variable selection. Posterior computations are performed via a Metropolis-Hastings-within-Gibbs sampler using a truncation-based algorithm for stick-breaking priors. We compare the efficiency of the proposed approach with well-established techniques in an extensive simulation study and illustrate its practical performance by an application to nonparametric modelling of the power consumption in a sewage treatment plant. 相似文献
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当代中国的改革是不断用政策来修正制度或体制。改革就是对政策、法规和体制的调整,这种调整最终体现为人们利益关系的变化,用分层理论表述则最终体现为调整社会分层结构。当代中国的政策调整自改革开放以来分为两个重要时期,一个是1992年邓小平南巡讲话以后;一个是2002年中共十六大以后。当前政策调整的趋势,明显地增加了公平方面的政策变量,试图使社会资源的配置向普惠的方向调整。但从2007年算起,尚需要三十三年才能将中国调整成一个中等收入层为主体的社会分层结构。所以,对社会结构的调整,需要做长时期的努力。 相似文献
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In this paper, we develop a new estimation procedure based on quantile regression for semiparametric partially linear varying-coefficient models. The proposed estimation approach is empirically shown to be much more efficient than the popular least squares estimation method for non-normal error distributions, and almost not lose any efficiency for normal errors. Asymptotic normalities of the proposed estimators for both the parametric and nonparametric parts are established. To achieve sparsity when there exist irrelevant variables in the model, two variable selection procedures based on adaptive penalty are developed to select important parametric covariates as well as significant nonparametric functions. Moreover, both these two variable selection procedures are demonstrated to enjoy the oracle property under some regularity conditions. Some Monte Carlo simulations are conducted to assess the finite sample performance of the proposed estimators, and a real-data example is used to illustrate the application of the proposed methods. 相似文献
7.
Sumith Gunasekera 《统计学通讯:模拟与计算》2017,46(2):933-947
The Theil, Pietra, Éltetö and Frigyes measures of income inequality associated with the Pareto distribution function are expressed in terms of parameters defining the Pareto distribution. Inference procedures based on the generalized variable method, the large sample method, and the Bayesian method for testing of, and constructing confidence interval for, these measures are discussed. The results of Monte Carlo study are used to compare the performance of the suggested inference procedures from a population characterized by a Pareto distribution. 相似文献
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Clément de Chaisemartin Luc Behaghel 《Econometrica : journal of the Econometric Society》2020,88(4):1453-1477
Oversubscribed treatments are often allocated using randomized waiting lists. Applicants are ranked randomly, and treatment offers are made following that ranking until all seats are filled. To estimate causal effects, researchers often compare applicants getting and not getting an offer. We show that those two groups are not statistically comparable. Therefore, the estimator arising from that comparison is inconsistent when the number of waitlists goes to infinity. We propose a new estimator, and show that it is consistent, provided the waitlists have at least two seats. Finally, we revisit an application, and we show that using our estimator can lead to a statistically significant difference with respect to the results obtained using the commonly used estimator. 相似文献
9.
本文建立一种改进的非参数期权定价模型,称为单指标非参数期权定价模型。相比现有非参数回归期权定价模型是期权价格关于各个因素的多元回归函数,本模型通过变量变换把期权价格多个因素指标转换为一个综合变量——单指标,得到期权价格关于单指标的一元非参数回归方程。改进的模型实现了多元非参数期权定价模型的降维和简化了模型计算;还通过多个期限期权的单指标组合解决了非参数估计的样本数量问题;以及通过期限平滑解决了现有非参数定价模型中的日历效应问题。选取上证50ETF期权数据实证分析表明,无论是样本内的估计结果还是样本外的预测结果都比传统的Black-Scholes模型、半参数Black-Scholes模型和多元非参数回归期权定价模型估计效果有提高。 相似文献
10.
María Bustelo 《Journal of Women, Politics & Policy》2017,38(1):84-101
ABSTRACTFeminist scholars have challenged the neutrality of policymaking processes and the outputs resulting from these processes. However, some elements of policymaking have not been studied as well as others. In this article I explore the concept of evaluation from a gender+ perspective as an essential step for a complete gender mainstreaming strategy, which can help to identify gender issues that should be integrated into the content of evaluated policies and to ensure gender does not get lost in the policymaking process. This exploration is carried out by relying on feminist policy and evaluation studies. 相似文献