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51.
While there has been considerable research on the analysis of extreme values and outliers by using heavy-tailed distributions, little is known about the semi-heavy-tailed behaviors of data when there are a few suspicious outliers. To address the situation where data are skewed possessing semi-heavy tails, we introduce two new skewed distribution families of the hyperbolic secant with exciting properties. We extend the semi-heavy-tailedness property of data to a linear regression model. In particular, we investigate the asymptotic properties of the ML estimators of the regression parameters when the error term has a semi-heavy-tailed distribution. We conduct simulation studies comparing the ML estimators of the regression parameters under various assumptions for the distribution of the error term. We also provide three real examples to show the priority of the semi-heavy-tailedness of the error term comparing to heavy-tailedness. Online supplementary materials for this article are available. All the new proposed models in this work are implemented by the shs R package, which can be found on the GitHub webpage. 相似文献
52.
Ahmad Karimi 《Identities: Global Studies in Culture and Power》2018,25(4):456-474
This paper looks at current struggles of Iranian gay men to form new sexual identities that are directly tied to family structure and based on values of emotional bond and commitment to a same-sex partner. Based on fieldwork conducted among Iranian gay men in 2012–2014 and through looking at Iranian gay men’s terminologies, Hamjensgara and Gay in particular, I will clarify how Iranian gays, in a way different from that of Western LGBT activists, are trying to portray a positive image of their sexuality in relation to local family standards so they can be integrated into the Iranian family structure, which is the central space of regulating identities in Iran. 相似文献
53.
Do Immigrants Catch‐up with the Natives in Terms of Earnings? Evidence from Individual Level Data of Canada 下载免费PDF全文
Rayaneh Esmaeilzadeh Nisar Ahmad Amjad Naveed 《International migration (Geneva, Switzerland)》2018,56(5):204-242
This article analyses differences in dynamic transitions into and out of any of the five hourly wage quintiles and quintile zero (unemployed and non‐employed people) between immigrants and natives for the period 1993‐2004. Using Longitudinal Level data from Survey of Labour and Income Dynamics (SLID) for men aged 25 to 55, we investigate how unobserved heterogeneity factors and initial conditions may affect individuals’ propensity to stay in or leave any of the wage quintiles. We also consider a dynamic multinomial logit model with the random effects approach. Empirical results show that state dependence exists in all hourly wage quintiles. Moreover, education, experience, marital status, immigrant minority status, and age at immigration are significant factors determining hourly wage differentials between immigrants and natives. 相似文献
54.
In the multistage processes, quality of a process or a product at each stage is related to the previous stage(s). This property is referred to as a cascade property. Sometimes, quality of a process is characterized by a profile. In this paper, we consider a two-stage process with a normal quality characteristic in the first stage and a simple linear regression profile in the second stage. Then we propose two methods to monitor quality characteristics in both stages. The performance of the proposed two methods is evaluated through a numerical example in terms of average run length criterion. 相似文献
55.
Ahmad Khalili Minoo Heidari Almasi Leyla Sedighipour Yaghoub Salek Zamani Mohammad Reza Omid Zohoor 《Journal of women & aging》2017,29(6):505-514
The aim of the present study was to evaluate the long-term effect of back extensor strengthening exercises on health-related quality of life (QOL) in women with osteoporosis. In this randomized clinical trial, 183 women with osteoporosis were treated with pharmacotherapy and weight-bearing and balance-training exercises. The case group additionally performed back extensor exercises at home. Patients filled out the Persian version of the Short Form (SF-36) QOL questionnaire at baseline and 6 months post treatment. At the end, all physical and mental parameters of the SF-36 questionnaire improved significantly in the case group, except for one subscale of mental health, compared to the control group. In the control group, only some physical health dimensions (bodily pain, role limitation, physical function, vitality), and mental health status as a mental health subscale improved. In conclusion, considering a major impact of back extensor exercises on improving QOL in women with osteoporosis over the long term, these exercises should be prescribed in routine management of these patients. 相似文献
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Recently, social psychologists have given considerable attention to the possibility that empathy can be used to improve intergroup attitudes and relations. For this possibility to bear practical fruit, it is important to know what is meant by empathy because different researchers use the term to refer to different psychological states. It is also important to understand how each of these empathy states might affect intergroup relations by reviewing theory and research on the psychological processes involved, and it is important to consider the limitations of each form of empathy as a source of improved intergroup relations. Finally, it is important to consider the role of different empathy states in existing programs designed to improve intergroup relations, whether in protracted political conflicts, in educational settings, or via media. In this article, we pursue each of these goals. 相似文献
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Saeed Ahmad 《Journal Of Human Behavior In The Social Environment》2013,23(8):801-809
Youth are considered an important segment of a country’s population. This article explores the effect of socioeconomic status on apathy among youth. It also tries to determine the association between apathy and political participation. Data were collected from four universities through a self-structured questionnaire given to students. A field survey was used to collect 882 questionnaires. Data were entered in SPSS, and data analysis was done by using ordinal regression analysis. A medium level of apathy (75.5%) and political participation (46.0%) was prevalent among educated youth. Results revealed a significant effect of number of siblings, age, gender, education, father’s education, and mother’s education on apathy. An association was also found between apathy and political participation. 相似文献
60.
ABSTRACT The terms “empowerment,” “rights,” and “inclusiveness” are now commonly used in public policy, but little emphasis is placed on “accessibility” issues in the integration of disabled people. This article proposes a composite index to measure economic support provisions, such as employment, vocational training, microfinance, and safety nets. The index was tested in a case study (N= 245) of two districts in Pakistan. Results support a “cost/benefit”-based philosophy, rather than the “means–ends” goal, where the disabled poor are viewed as unproductive and risky payers, instead of giving them an opportunity to exercise their potential. Change for the disadvantaged poor can be brought about with the mandatory use of this index in local annual audits. Future research might examine the impact of the index and standardize it for global use. 相似文献