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Subrata Chakraborty Dhrubajyoti Chakravarty Josmar Mazucheli Wesley Bertoli 《Journal of applied statistics》2021,48(4):712
A discrete version of the Gumbel distribution (Type-I Extreme Value distribution) has been derived by using the general approach of discretization of a continuous distribution. Important distributional and reliability properties have been explored. It has been shown that depending on the choice of parameters the proposed distribution can be positively or negatively skewed; possess long-tail(s). Log-concavity of the distribution and consequent results have been established. Estimation of parameters by method of maximum likelihood, method of moments, and method of proportions has been discussed. A method of checking model adequacy and regression type estimation based on empirical survival function has also been examined. A simulation study has been carried out to compare and check the efficacy of the three methods of estimations. The distribution has been applied to model three real count data sets from diverse application area namely, survival times in number of days, maximum annual floods data from Brazil and goal differences in English premier league, and the results show the relevance of the proposed distribution. 相似文献
84.
Is there a link between designated driver usage and alcohol consumption? We hypothesize that the use of a designated driver lowers the cost of drinking which, in turn, increases alcohol consumption. We examine the effect on drinking intensity (which incorporates low levels of alcohol use) and binge drinking (which measures greater alcohol use), using a proxy for designated driver usage. If workplace rules forbid alcohol use for safety or other reasons, a large potential cost of drinking is the possible job loss (or other penalty) incurred if an employed person tests positive for alcohol. We add variables to our model related to workplace policies on alcohol use by workers to ascertain if designated drivers still influence drinking. We test these hypotheses utilizing a large dataset from the 2006 and 2007 National Survey on Drug Use and Health (NSDUH) which includes several measures of alcohol use, in addition to a host of other correlates. Findings reveal that our proxy for designated driver use increases the incidence of drinking and the results hold even after controlling for workplace alcohol testing. 相似文献
85.
Patricia Bromley Evan Schofer Wesley Longhofer 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》2018,29(3):526-540
We address two views from organization theory to consider the expansion and effects of nonprofits in education: first, a functional view emphasizing the direct effect of work of civil society organizations (CSOs) and, second, a phenomenological neoinstitutional view focusing on the cultural meaning of education CSOs as indicators of a rationalized, liberal world society. We use panel regression models with country fixed effects to analyze the cross-national expansion of domestic education CSO sectors in 130 countries from 1970 to 2014. We then examine the association between the size of the domestic education CSO sector and memberships in international non-governmental organizations (INGOs) with education outcomes, including spending, education aid, secondary and tertiary enrollments, and the share of women in secondary and tertiary education. Results show that INGO memberships, an expanded state, and an expanded education system are highly associated with the expansion of a domestic education CSO sector. Both domestic CSOs and INGO memberships tend to have a significant, positive relationship with education outcomes net of other factors. We also find preliminary evidence indicating that the causal forces at play are more complex than a straightforward direct effect of education CSOs doing good work. Specifically, CSOs, at least in part, are indicators of a Western, liberal model of a proper modern society; the underpinning culture, represented by CSOs, accounts for some educational expansion above and beyond the benefit (or harm) caused by any given entity. 相似文献
86.
Chase Wesley Raymond 《Journal of Sociolinguistics》2018,22(2):161-189
The present study seeks to illustrate how the theory and method of conversation analysis (CA) can be used to begin to unpack the notion of ‘contact’ in contact linguistics research. After reviewing language and dialect contact as they are traditionally conceptualized, we describe an additional set of questions inspired by CA's fundamental concern with relevance and accountability. It is argued that, by analyzing the structure and design of turn‐by‐turn talk in situations of dialect contact, we are able to investigate how co‐participants themselves go about carving out the boundaries of their respective dialects, how they can link those dialects to social identities, and how those social identities can become ‘procedurally consequential’ for the design of subsequent talk between the interlocutors. It is ultimately hypothesized that relevance and accountability at the micro‐interactional level may provide new insight into the moment‐by‐moment mechanisms that bring about the comparatively more macro‐level outcomes of dialect contact (e.g. leveling, koineization, etc.) that have been previously identified in contact linguistics research. 相似文献
87.
While existing research supports that participation in high‐school athletics is associated with better education and labor‐market outcomes, the mechanisms through which these benefits accrue are not well established. Using individual microdata collected daily, and team‐specific schedules, we retrieve estimates of the causal effect of high‐school athletic participation on absenteeism, suggesting that participation decreases absences, driven primarily by reductions in unexcused absences in boys. There are also strong game‐day effects in truancy, in both boys and girls, with truancy declines on game days more than offset by subsequent absenteeism. Important heterogeneity by race, gender, and family structure may serve to substantially reduce racial gaps in truancy and achievement. (JEL I21, L83) 相似文献
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Wesley Shrum Paul Nyaga MbatiaAntony Palackal Dan-Bright S. DzorgboRicardo B. Duque Marcus Antonius Ynalvez 《Social science research》2011,40(2):614-625
In contrast to recent US studies showing a decrease in core network size, our Kenyan data reveals substantial network growth. We attribute this to the diffusion of mobile telephones. Results from pooled survey data from Nairobi professionals and entrepreneurs in 2002 and 2007 as well as qualitative interviews from 2007 to 2009 show virtual saturation in the diffusion of phones during this period, but no direct effect of technology use. What explains this puzzle is a network effect of mobile telephony: increased technological access to existing networks in a context of resource scarcity leads to a strengthening of weak ties and the enhancement of core networks among Kenyans. Video ethnographic data before and after the 2007 post-election unrest supports this interpretation, showing that mobile phones are a crucial resource in managing interpersonal networks for instrumental purposes. 相似文献
90.
Jeremy R. Porter Ronald E. Cossman Wesley L. James 《Journal of Population Research》2009,26(3):273-278
Understanding the effects and consequences of missing data imputation is vital to the ability to obtain meaningful and reliable statistics and coefficients in the examination of any quantitatively-based phenomena. Over time a series of sophisticated methods have been developed to handle the issue of missing data imputation however, these sophisticated methods may not always be appropriate or attainable. In these specific cases more traditional approaches to missing data imputation must be employed and driven by the research project, theoretical framework, and the data. In this research note we offer a brief account of one such instance, implementing a large-group mean imputation approach to handling missing data. The analysis is drawn from a much larger project and shows the effect of proper group selection in terms of mean imputation using a cross-validation approach based on the imputed data’s relation to known values. Ultimately, the results show that the use of Rural-Urban Continuum codes are superior to currently used group-means in the U.S., thus introducing a new, and more efficient, approach to the handling of missing data using group-mean imputation. 相似文献