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31.
We develop a ranking of compact, convex and comprehensive opportunity sets defined in the evaluative space of individual functionings. We suppose the existence of a target, that is a multi-dimensional bliss point in terms of functionings. This leads us to define concepts such as essentiality and freedomin a novel way. As a main result, we give an axiomatic characterization of the ranking obtained by minimizing the Euclidean distance between each opportunity set and the target. 相似文献
32.
Lluis Renart Assistant Professor of Marketing Francesco Pars Professor Scientific Collaborator in Marketing 《European Management Journal》1991,9(4)
This complete Case Study, including Teaching Notes, won the 1991 EFMD Case Writing Competition Prize on a European theme, as well as receiving much praise from the judges. The Case concerns a group of four different European paint manufacturers co-operating in an EC Economic Interest Grouping to improve their economic position in European markets. The co-ordination of raw material purchasing policies was the first area of joint action; they obtained significant discounts straight away. Then they could begin to think about competing together against the big paint multinationals established in Europe. Later, talks started on joint investment and technology transfer.Lluis Renart and Francesco Parés have written a stimulating Case Study with Teaching Notes of value to business students and managers wishing to test out their analytical abilities. 相似文献
33.
DAgostino Antonella Schirripa Spagnolo Francesco Salvati Nicola 《Statistical Methods and Applications》2022,31(1):1-20
Statistical Methods & Applications - Using the Programme for International Student Assessment (PISA) 2015 data for Italy, this paper offers a complete overview of the relationship between test... 相似文献
34.
35.
AbstractThis paper focuses on the inference of suitable generally non linear functions in stochastic volatility models. In this context, in order to estimate the variance of the proposed estimators, a moving block bootstrap (MBB) approach is suggested and discussed. Under mild assumptions, we show that the MBB procedure is weakly consistent. Moreover, a methodology to choose the optimal length block in the MBB is proposed. Some examples and simulations on the model are also made to show the performance of the proposed procedure. 相似文献
36.
A measure of human development, which is not affected by some relevant drawbacks of the commonly utilized measures, is constructed. It is a function of several attributes associated with various factors — economic, social, environmental — and also includes non-homogeneous attributes. It is non-linear in its variables, so that it includes possible interactions among the attributes. Furthermore, it takes into account public opinion about human development through a well-defined procedure of assessment elicitation. The formulation of the human development function constituting the measure is described when considering just one attribute and then several attributes, and the difference between independence and dependence in assessment is shown. Such a procedure is applied to the measurement of human development in 9 countries of the EU, by using thirteen attributes related to the economic, social and environmental fields as well as to the quality of life. 相似文献
37.
Francesco Porro 《统计学通讯:理论与方法》2013,42(18):3967-3977
The aim of this article is to establish an ordering related to the inequality for the recently introduced Zenga distribution. In addition to the well-known order based on the Lorenz curve, the order based on I(p) curve is considered. Since the Zenga distribution seems to be suitable to model wealth, financial, actuarial, and, especially, income distributions, these findings are fundamental in the understanding of how parameter values are related to inequality. This investigation shows that for the Zenga distribution, two of the three parameters are inequality indicators. 相似文献
38.
Francesco Bravo 《统计学通讯:理论与方法》2013,42(5):1345-1369
AbstractThis article develops quasi-likelihood estimation for generalized varying coefficient partially linear models when the response is not always observable. This article considers two estimation methods and shows that under the assumption of selection on the observables the resulting estimators are asymptotically normal. As an application of these results this article proposes a new estimator for the average treatment effect parameter. A simulation study illustrates the finite sample properties of the proposed estimators. 相似文献
39.
We present a decomposition of the correlation coefficient between xt and xt?k into three terms that include the partial and inverse autocorrelations. The first term accounts for the portion of the autocorrelation that is explained by the inner variables {xt?1 , xt?2 , …, x t? k+1}, the second one measures the portion explained by the outer variables {x t+1, x t+2, } ∪ {x t?k?1, x t?k?2,…} and the third term measures the correlation between x t and xt?k given all other variables. These terms, squared and summed, can form the basis of three portmanteau-type tests that are able to detect both deviation from white noise and lack of fit of an entertained model. Quantiles of their asymptotic sample distributions are complicated to derive at an adequate level of accuracy, so they are approximated using the Monte Carlo method. A simulation experiment is carried out to investigate significance levels and power of each test, and compare them to the portmanteau test. 相似文献
40.
In this paper the out-of-sample prediction of Value-at-Risk by means of models accounting for higher moments is studied. We
consider models differing in terms of skewness and kurtosis and, in particular, the GARCHDSK model, which allows for constant
and dynamic skewness and kurtosis. The issue of VaR prediction performance is approached first from a purely statistical viewpoint,
studying the properties concerning correct coverage rates and independence of VaR violations. Then, financial implications
of different VaR models, in terms of market risk capital requirements, as defined by the Basel Accord, are considered. Our
results, based on the analysis of eight international stock indexes, highlight the presence of conditional skewness and kurtosis,
in some case time-varying, and point out that asymmetry plays a significant role in risk management. 相似文献