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31.
Developing statistical methods to model hydrologic events is always interesting for both statisticians and hydrologists, because of its importance in hydraulic structures design and water resource planning. Because of this, a flexible 3-parameter generalization of the exponential distribution is introduced based on the binomial exponential 2 (BE2) distribution [2]. The proposed distribution involving the exponential, gamma and BE2 distributions as submodels; and it exhibits decreasing, increasing and bathtub-shaped hazard rates, so it turns out to be quite flexible for analyzing non-negative real life data. Some statistical properties, parameters estimation and information matrix of the distribution are investigated. The proposed distribution, Gumbel, generalized Logistic and other distributions are utilized to model and fit two hydrologic data sets. The distribution is shown to be more appropriate to the data than the compared distributions using the selection criteria: average scaled absolute error, Akaike information criterion, Bayesian information criterion and Kolmogorov–Smirnov statistics. As a result, some hydrologic parameters of the data are obtained such as return level, conditional mean, mean deviation about the return level and the rth moments of order statistics. 相似文献
32.
We introduce a Bayesian instrumental variable procedure with spatial random effects that handles endogeneity, and spatial dependence with unobserved heterogeneity. We find through a limited Monte Carlo experiment that our proposal works well in terms of point estimates and prediction. We apply our method to analyze the welfare effects generated by a process of electricity tariff unification on the poorest households. In particular, we deduce an Equivalent Variation measure where there is a budget constraint for a two-tiered pricing scheme, and find that 10% of the poorest municipalities attained welfare gains above 2% of their initial income. 相似文献
33.
Andrs Ramírez‐Hassan Manuel Correa‐Giraldo 《Australian & New Zealand Journal of Statistics》2019,61(3):360-379
Central to many inferential situations is the estimation of rational functions of parameters. The mainstream in statistics and econometrics estimates these quantities based on the plug‐in approach without consideration of the main objective of the inferential situation. We propose the Bayesian Minimum Expected Loss (MELO) approach focusing explicitly on the function of interest, and calculating its frequentist variability. Asymptotic properties of the MELO estimator are similar to the plug‐in approach. Nevertheless, simulation exercises show that our proposal is better in situations characterised by small sample sizes and/or noisy data sets. In addition, we observe in the applications that our approach gives lower standard errors than frequently used alternatives when data sets are not very informative. 相似文献
34.
Medhat M. Bassiony Usama M. Youssef Hayam El-Gohary Mohamed Abdelghani Mervat S. Hassan Ghada Salah El-Deen 《心理学和人类性特征杂志》2019,31(1):109-114
Objective: Here we have investigated the association between tramadol abuse and male sexual function. Methods: Eighty-two male tramadol abuse patients and 55 healthy controls (20- to 45-years-old) were included in the study. Data from a sociodemographic questionnaire and the International Index of Erectile Function Questionnaire were collected and analyzed. Results: The tramadol abuse patients were 5 times more likely than their healthy counterparts to have erectile dysfunction. The tramadol abuse patients also had worse scores in the orgasmic, sexual desire, intercourse satisfaction, and overall satisfaction domains compared to the controls. Conclusion: Sexual dysfunctions are common among tramadol abuse patients. 相似文献
35.
36.
Tawfik Hassan 《Statistical Methods and Applications》1994,3(3):419-428
Summary A simple procedure for numerical solution of the likelihood equations for estimating the regression parameters of a first-order
response surface model for the treatment parameters of mixture paired comparison experiments is developed. It is demonstrated
that, for defined rotatable designs, those regression parameters are simple functions of the main effect parameters of a corresponding
factorial model with no interactions. The maximum likelihood estimators of those main effect parameters, and hence of their
corresponding regression parameters, are obtained through using procedures of treatment contrasts, factorial and iterations.
A numerical example is given to illustrate applications of the procedures developed in this paper. 相似文献
37.
Amal Hassan Fadlalla 《Identities: Global Studies in Culture and Power》2013,20(2):143-174
This article examines the cultural construction of difference, danger, and disease among the Muslim patrilineal Hadendowa-Beja of eastern Sudan and focuses on the ways in which gendered discourses, together with symbolic and ritualistic practices, diagnose historical relationships of power, powerlessness, and social conflict. In particular, I show how the female body, viewed as a “fertile womb-land,” is the locus of anxieties about foreign dangers and diseases, which are perceived to be threatening to collective identity and well being. By using “foreignness” as a double-edged category linked to both power and danger, I examine how Hadendowa's feminization of social vulnerability draws attention to their own political history of exclusion and displacement. 相似文献
38.
Shirley Ann Thomas Nicholas Alexander Prys Jun Sung Hong Hassan Jafer 《Journal Of Human Behavior In The Social Environment》2013,23(6):722-730
ABSTRACTThe present study applies the social-ecological framework to examine multiple level correlates of aggressive behavior of veterans of the first Gulf War in 1991. Data were collected from the VA‘s Persian Gulf Family Support Programs (PGFSP), and the sample includes 1,519 veterans who participated in the PGFSP. At the individual level, the study finds that younger and female veterans and those with higher self-esteem were less likely to report displaying aggressive behavior. At the interpersonal level, veterans who displayed misconduct in the home are more likely to display aggressive behavior. At the community level, veterans who were in the Air Force was less likely, while those in the Marines were more likely to be aggressive. Implications for practice are discussed. 相似文献
39.
Mohd Sayuti Hassan Kamarulazizi Ibrahim 《Journal Of Human Behavior In The Social Environment》2013,23(3):182-191
Microcredit has been recognized as one of the most efficient tools for alleviating poverty by the United Nations considering its significant contribution in terms of job creation and revenue generation for governments. Microcredit programs can change the lives of people and revitalize communities in the world’s poorest as well as the richest countries. This study looks at 350 entrepreneurs who joined the scheme of various microcredit programs in Penang, Malaysia. In this study, findings have been obtained that show that microcredit loans have successfully increased entrepreneur income, have positive impacts on business, and fulfill basic needs of entrepreneurs. 相似文献
40.
This paper presents a socio‐economic profile of Asian migrants in Australia, using data from the 1981 Census of Population. It shows that Asian migrants are highly educated (large proportions are university graduates and are in professional occupations), English‐speaking (many are bi‐lingual) and mostly Christian. The paper then goes on to estimate the economic benefits Asian migrants bring when they migrate to Australia, as well as the costs they might impose on the economy. Benefits were estimated by measuring the costs of education and training that Australia avoided by allowing skilled migrants to enter the country. In addition, migrants brought in financial capital when they came to Australia. They also contributed to the supply of goods and services by participating in productive employment. The costs that migrants might impose on the economy relate to the possibility of taking jobs and other resources (such as education, health and other public services) which might otherwise have gone to other Australians. Careful estimates of these factors indicate that, far from imposing a burden, Asian migrants make a substantial net contribution to the economy. In addition, the findings do not lend support to the view that they may be a cause of societal dissention, or a threat to Australian democratic institutions. On the contrary, the social attributes they possess indicate that they are well placed to settle successfully, and to make a substantial contribution to the development of Australian society. 相似文献