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141.
Matthew Stephenson R. Ayesha Ali Gerarda A. Darlington 《Revue canadienne de statistique》2019,47(4):729-747
Recent research has demonstrated that information learned from building a graphical model on the predictor set of a regularized linear regression model can be leveraged to improve prediction of a continuous outcome. In this article, we present a new model that encourages sparsity at both the level of the regression coefficients and the level of individual contributions in a decomposed representation. This model provides parameter estimates with a finite sample error bound and exhibits robustness to errors in the input graph structure. Through a simulation study and the analysis of two real data sets, we demonstrate that our model provides a predictive benefit when compared to previously proposed models. Furthermore, it is a highly flexible model that provides a unified framework for the fitting of many commonly used regularized regression models. The Canadian Journal of Statistics 47: 729–747; 2019 © 2019 Statistical Society of Canada 相似文献
142.
Repeated measurement designs are widely used in medicine, pharmacology, animal sciences and psychology. These designs balance out the residual effects. The situations where balanced repeated measurements designs require a large number of the subjects, partially-balanced repeated measurements designs should be used. In this paper some infinite series are developed which provide circular partially-balanced repeated measurement designs for p (periods) even. Catalogues of circular partially-balanced repeated measurement designs are also presented for v (treatments) ≤ 100 with p = 5, 7 & 9. 相似文献
143.
Muhammet Guzelsoy Mustafa Murat Aydos Soner Coban Ali Riza Turkoglu Kadir Acibucu Hakan Demirci 《The aging male》2018,21(3):193-199
Aim: To compare the correlation of visual prostate symptom score (VPSS) and international prostate symptom score (IPSS). To investigate the effect of educational level and age in the responses to VPSS and IPSS.Method: Three hundred and nine patients who gave consent and applied via LUTS to our institution were included in this study. They were requested to fill IPSS and VPSS. The patients were divided into two groups as middle-aged and elderly with a cutoff point of 65?years. They were divided into six groups based on educational level. SPSS was used for the statistical evaluation.Results: The mean age of the patients was 61.5?±?8.9?years. The correlation was found between IPSS and VPSS (p?.05). Education was found not to contribute for answering IPSS and VPSS (p?=?.332 and .138, respectively). No difference was found between the middle-aged and elderly groups in terms of the rates of inability to answer IPSS and VPSS (p?=?.177 and .681, respectively).Conclusions: There is a correlation between VPSS and IPSS. VPSS can be used as an auxiliary or alternative tool instead of IPSS in evaluating LUTS; however, has no superiority to IPSS in elderly group. Currently, the best option to exclude bias in illiterate group is VPSS. 相似文献
144.
The goal of this study was to assess the existing solid waste management stream in Kabul, Afghanistan, as a basis for developing a sustainable solid waste management system. Achieving the goal of this study necessitated (1) assessment of the major factors affecting the solid waste stream and it collection; (2) estimation of the solid waste generation rate; and (3) characterization of the solid waste composition. The solid waste characterization data demonstrated that the solid waste stream in the city of Kabul, although similar to low income countries in Asia, especially to South Asian countries, is unique in composition and solid waste generation rate. The solid waste stream was characterized with large organic fraction of approximately 70% and specific weight of 413 ± 52 kg/m3. The estimated solid waste generation rate ranged between 0.31 and 0.43 kg/capita/day. It is expected, however, that the solid waste stream characteristics for the city of Kabul will change over time to be similar to waste streams of cities in the region with similar socio-economic, cultural and religious background. 相似文献
145.
Ali Çaksu 《Journal of historical sociology》2017,30(1):27-42
Ibn Khaldun was a statesman, diplomat, scholar and judge. His masterpiece Muqaddimah bears testimony to his skills in some other fields like economy and poetry too. As an intellectual of his time, he was naturally interested in philosophy as well. He had an education in philosophy and had a considerable knowledge in both Greek and Islamic philosophy. In fact, he is considered a philosopher of history and even the first one. This article will display an aspect of Ibn Khaldun's interest and relation to philosophy. It will discuss his conception of causation and analyze how it works in his history. 相似文献
146.
When modeling correlated binary data in the presence of informative cluster sizes, generalized estimating equations with either resampling or inverse-weighting, are often used to correct for estimation bias. However, existing methods for the clustered longitudinal setting assume constant cluster sizes over time. We present a subject-weighted generalized estimating equations scheme that provides valid parameter estimation for the clustered longitudinal setting while allowing cluster sizes to change over time. We compare, via simulation, the performance of existing methods to our subject-weighted approach. The subject-weighted approach was the only method that showed negligible bias, with excellent coverage, for all model parameters. 相似文献
147.
There are many estimators for population mean: arithmetic mean, median, root mean square, geometric mean, harmonic mean, and so forth. Which one is the best? Here, we answer this question given two measurements from a uniform distribution. 相似文献
148.
Microfinance as a Development and Poverty Alleviation Tool in Rural Bangladesh: A Critical Assessment 下载免费PDF全文
Isahaque Ali Zulkarnain A. Hatta Azlinda Azman Shariful Islam 《Asian Social Work and Policy Review》2017,11(1):4-15
Poverty is multidimensional in nature and exists in every part of the world. Microfinance is considered one of the most important programs to achieve poverty reduction, particularly in Bangladesh. It has been estimated that nearly 45% of Bangladesh's population lives below the poverty line. This qualitative research study was conducted in order to determine the effectiveness of microfinance programs and the contributing factors to the high‐level of poverty among microfinance beneficiaries in the district of Bogra, Bangladesh. Study findings indicated that microfinance programs were ineffective as a result of high interest rates; insufficient loans; unproductive use of loans; corruption and poor skills of microfinance institution staff; weekly repayment schedules; and physical and mental harassment of poor women. Additionally, the lack of employment opportunities, education, healthcare facilities and social safety nets; natural disasters; the dowry system; and the rising cost of basic daily needs have also contributed to chronic poverty. 相似文献
149.
This paper presents new evidence on the impact of female education on fertility in Egypt using the change in the length of primary schooling as the source of exogenous variation in education. Beginning in 1988, the Egyptian government cut the number of primary school years from six to five, moving from a 12-year system of pre-university education to an 11-year system. This policy change affected all individuals born on or after October 1977. Using triennial pooled cross-section data from 1992 to 2014 and a nonparametric regression discontinuity approach, we compare education and fertility of women born just before and right after October 1977. Our analysis shows that female education significantly reduces the number of children born per woman. The reduction in fertility seems to result from delaying maternal age rather than changing women’s fertility preferences. We also provide evidence that female education in Egypt does not boost women’s labor force participation or affect their usages of contraceptive methods. Female education, however, does appear to increase women’s age at marriage which might explain the delay of maternal age. 相似文献
150.
Gianni Betti Mehmet Ali Karadag Ozlem Sarica Baris Ucar 《Social indicators research》2017,132(3):1023-1035
The main aim of the paper is to contribute to the poverty measurement literature by demonstrating a method to reduce the impact of equivalence scales in poverty measurement. This is accomplished by choosing the most appropriate reference household type. The results showed that one adult household is certainly not suitable for being the reference household type. When one adult household is set as the reference, in the range of no equivalence scale and per capita equivalence scale, poverty head count ratio changes from 1 to 48 %, showing the huge effect of the equivalence scale choice. Also the analyses at household size level showed that one adult household type is not convenient to be the reference household type. On the other hand, no clear distinction could be made between central household types, but the importance of choosing a household type close to the center was demonstrated for Turkish data. 相似文献