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Dissertations / Theses on the topic 'Fractional regression'

Author: Grafiati
Published: 7 September 2021
Last updated: 29 July 2025

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1

McCants, Michael. "Efficacy of robust regression applied to fractional factorial treatment structures." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/9260.

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Master of Science<br>Department of Statistics<br>James J. Higgins<br>Completely random and randomized block designs involving n factors at each of two levels are used to screen for the effects of a large number of factors. With such designs it may not be possible either because of costs or because of time to run each treatment combination more than once. In some cases, only a fraction of all the treatments may be run. With a large number of factors and limited observations, even one outlier can adversely affect the results. Robust regression methods are designed to down-weight the adverse affe
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2

Lee, Wonwoo. "Fractional principal components regression: a general approach to biased estimators." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/49819.

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3

Fernández, Villegas Renzo. "A beta inflated mean regression model with mixed effects for fractional response variables." Master's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/8847.

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In this article we propose a new mixed effects regression model for fractional bounded response variables. Our model allows us to incorporate covariates directly to the expected value, so we can quantify exactly the influence of these covariates in the mean of the variable of interest rather than to the conditional mean. Estimation is carried out from a Bayesian perspective and due to the complexity of the augmented posterior distribution we use a Hamiltonian Monte Carlo algorithm, the No-U-Turn sampler, implemented using Stan software. A simulation study for comparison, in terms of bias and
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4

Weiershäuser, Arno [Verfasser]. "Piecewise polynomial regression with fractional residuals for the analysis of calcium imaging data / Arno Weiershäuser." Konstanz : Bibliothek der Universität Konstanz, 2012. http://d-nb.info/1021315745/34.

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5

Chakma, Bhaswar. "Using fractional regression models to analyse the determinants of capital structure and efficiency of european manufacturing firms." Master's thesis, Universidade de Évora, 2017. http://hdl.handle.net/10174/21052.

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Quando a variável dependente num modelo econométrico tem uma natureza fraccionária, correspondendo a uma proporção ou taxa, o modelo de regressão linear não é a forma mais indicada de modelar essa variável. Em vez disso, deve usar-se o chamado modelo de regressão para dados fraccionários, o qual tem em conta a natureza proporcional e limitada da variável dependente. Esta dissertação descreve as principais características deste modelo e realiza dois estudos empirícos que ilustram a sua utilidade na área da Economia e Finanças. O primeiro estudo analisa a estrutura de capital de empresas transfo
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6

Stoebner, Timothy J. "GEOGRAPHIC EFFECTS OF CLIMATE CHANGE ON MAJOR RURAL LAND COVERS OF THE CENTRAL UNITED STATES." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/dissertations/902.

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Geographic research on the Corn Belt and other regional landscapes of the central U.S. has not to date identified quantitatively the climatic, edaphic, topographic, and economic characteristics that determine rural land cover, and that therefore govern land cover change. Using the USDA/NASS Cropland Data Layer, this study identifies these characteristics using Multivariable Fractional Polynomials within a logistic regression framework. It maps the suitability distribution for corn, soybeans, spring and winter wheat, cotton, grassland, and forest land covers that dominate the central U.S., at
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7

Hudson, Richard James Frederick. "Long memory spectral regression : an approach using generalised least squares." Thesis, Queensland University of Technology, 2002.

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8

Alves, André Bernardo de Lemos. "Análise da eficiência do setor bancário na UE e os seus determinantes." Doctoral thesis, Universidade de Évora, 2018. http://hdl.handle.net/10174/23099.

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Esta tese tem como objetivo apresentar uma análise integrada da eficiência do sector bancário na União Europeia através da aplicação do método two-stage DEA – Data Envelopment Analysis, que permite a identificação dos determinantes da eficiência numa segunda etapa. A análise desenvolveu-se segundo quatro abordagens de eficiência bancária - produção, intermediação, ativos e rentabilidade – com recurso à base de dados Bankscope. Para cada uma das abordagens foi calculada a eficiência padrão e composta, com vista a expurgar o efeito de bancos falsos-eficientes e aumentar a robustez dos resultados
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9

Perugu, Harikishan C. "Integrating Advanced Truck Models into Mobile Source PM2.5 Air Quality Modeling." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1377871388.

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10

Martinez, Raydonal Ospina. "Modelos de regressão beta inflacionados." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-19102009-145726/.

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Nos últimos anos têm sido desenvolvidos modelos de regressão beta, que têm uma variedade de aplicações práticas como, por exemplo, a modelagem de taxas, razões ou proporções. No entanto, é comum que dados na forma de proporções apresentem zeros e/ou uns, o que não permite admitir que os dados provêm de uma distribuição contínua. Nesta tese, são propostas, distribuições de mistura entre uma distribuição beta e uma distribuição de Bernoulli, degenerada em zero e degenerada em um para modelar dados observados nos intervalos [0, 1], [0, 1) e (0, 1], respectivamente. As distribuições propostas são
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11

Stocker, Toni Clemens. "On the asymptotic properties of the OLS estimator in regression models with fractionally integrated regressors and errors." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-57370.

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12

Fetzer, Chase A. "Regression Analysis of Fracture Toughness for Secondary Osteons Located in Human Cortical Bone." DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/174.

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An experiment was carried out in order to locate and quantify osteon types within a sample of cortical bone taken from a human tibia. This was done using a microscope-camera assembly and the BioQuant computer software. The results of this were correlated with a previous experiment’s results on fracture toughness so that an analysis could be run on the data in order to determine the factors that most affect the value of fracture toughness of this cortical bone. Results were examined closely and the analysis repeated until the author was satisfied that the best possible model for fracture tou
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13

Fachini, Juliana Betini. "Modelos de regressão com e sem fração de cura para dados bivariados em análise de sobrevivência." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11134/tde-12092011-170753/.

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Neste trabalho são reunidos diferentes modelos e técnicas para representar situações experimentais ou observacionais de análise de sobrevivência. Para modelar respostas bivariadas e covariáveis foi proposto o modelo de regressão Kumaraswamy-Weibull bivariado. A presen»ca de indivíduos curados foi considerada sob duas diferentes abordagens, originando o modelo de regressão com fração de cura para dados bivariados por meio de cópulas e o modelo de regressão log-linear bivariado com fração de cura. Os parâmetros dos modelos foram esti- mados pelo método de máxima verossimilhança sujeito a restriç
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14

Diop, Aba. "Inférence statistique dans le modèle de régression logistique avec fraction immune." Phd thesis, Université de La Rochelle, 2012. http://tel.archives-ouvertes.fr/tel-00829844.

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Les modèles linéaires généralisés sont une généralisation des modèles de régression linéaire, et sont très utilisés dans le domaine du vivant. Le modèle de régression logistique, l'un des modèles de cette classe, très souvent utilisé dans les études biomédicales demeure le modèle de régression le plus approprié quand il s'agit de modéliser une variable discrète de nature binaire. Dans cette thèse, nous nous intéressons au problème de l'inférence statistique dans le modèle de régression logistique, en présence d'individus immunes dans la population d'étude.Dans un premier temps, nous considéron
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15

Monastyrenko, Evgenii. "Essays in international trade and energy." Thesis, Paris 1, 2018. http://www.theses.fr/2018PA01E018/document.

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Dans le chapitre 1, j’examine les résultats des fusions entre producteurs européens d’énergie en termes d’efficacité. Je calcule l’éco-efficacité en utilisant l’analyse de l’enveloppement des données et l’indice de productivité Malmquist-Luenberger. Je trouve que les fusions horizontales nationales, qui sont soigneusement réglementées, n’ont pas d’impact. Les fusions horizontales transfrontalières nuisent à l’éco-efficacité à court terme mais la stimulent deux ans après l’achèvement. Les fusions verticales nuisent à l’éco-efficacité. Je présente des suggestions de politiques concernant la régleme
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16

Zhao, Meng. "Treatment Comparison in Biomedical Studies Using Survival Function." Digital Archive @ GSU, 2011. http://digitalarchive.gsu.edu/math_diss/4.

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In the dissertation, we study the statistical evaluation of treatment comparisons by evaluating the relative comparison of survival experiences between two treatment groups. We construct confidence interval and simultaneous confidence bands for the ratio and odds ratio of two survival functions through both parametric and nonparametric approaches.We first construct empirical likelihood confidence interval and simultaneous confidence bands for the odds ratio of two survival functions to address small sample efficacy and sufficiency. The empirical log-likelihood ratio is developed, and the corre
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17

Sant'Anna, Ângelo Márcio Oliveira. "Ferramentas para modelagem e monitoramento de características de qualidade do tipo fração." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/21399.

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Esta tese apresenta a modelagem e o monitoramento de características de qualidade do tipo fração, que apresentam valores restritos ao intervalo [0,1] A motivação inicial é que a característica de qualidade do tipo fração pode ser melhor aproximada pela distribuição de probabilidade Beta e, geralmente, a modelagem e o monitoramento utilizados não supõem tal distribuição. Desta forma, os objetivos desta tese são: (i) Propor uma sistemática para seleção de modelos paramétricos considerando a classificação das variáveis resposta e das variáveis explicativas; (ii) Propor uma modelagem da fração não
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18

Bondavalli, Barbara. "Analisi delle associazioni tra prestazioni cognitive ed indici avanzati di neuroimaging in pazienti con declino cognitivo lieve di origine vascolare." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017.

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L'obiettivo del presente elaborato di tesi è lo studio dell'associazione tra variabili di neuroimaging e variabili neuropsicologiche, tramite analisi statistiche, con particolare attenzione agli indici strutturali in grado di interpretare i punteggi di test neuropsicologici ottenuti da pazienti affetti da deterioramento cognitivo lieve di origine vascolare e patologia dei piccoli vasi cerebrali. I metodi statistici impiegati consistono in analisi di regressione lineare multipla, sviluppati ed automatizzati nel pacchetto SPSS (Statistical Package for Social Science) e classificazione grazie ad
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19

Gbaguidi, David. "Modeles économétriques pour l'inflation : anticipations rationnelles et croyances adaptatives dans le cadre de la nouvelle courbe de philips keynesienne." Thesis, Aix-Marseille 2, 2011. http://www.theses.fr/2011AIX24014.

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Le premier chapitre consiste en une brève revue de littérature dont les éléments sont repris dans les différentes introductions des études empiriques proposées dans la suite de la thèse. L'objet de cet état des lieux est de fixer le cadre général des analyses macro-économétriques opérées dans la thèse. Ce cadre nous permet d'une part, d'envisager une adéquate intégration des anticipations des agents économiques dans le raisonnement ayant mené aux modèles keynésiens actuels et d'autre part, d'effectuer des estimations des principales versions de la courbe de Phillips introduites dans la littéra
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20

Silva, Sandra Lopes da. "NMR in the characterization of heavy residual procedural streams." Doctoral thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/13126.

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Doutoramento em Química<br>The main objective of this work was to monitor a set of physical-chemical properties of heavy oil procedural streams through nuclear magnetic resonance spectroscopy, in order to propose an analysis procedure and online data processing for process control. Different statistical methods which allow to relate the results obtained by nuclear magnetic resonance spectroscopy with the results obtained by the conventional standard methods during the characterization of the different streams, have been implemented in order to develop models for predicting these same propertie
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21

Palhares, José Eduardo Fernandes Teixeira. "Banking firms' performance and intellectual capital efficiency nexus." Master's thesis, 2018. http://hdl.handle.net/10773/24516.

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This study aims to assess 58 Iberian banks´ performance and its relationship with Intellectual Capital efficiency. Therefore, a two-stage analysis was conducted in order to address several proposed research questions related to Iberian (Portuguese and Spanish) banks in general, and each country, individually, during the period from 2013 to 2016. In a first-stage, sampled banks´ performance and respective rankings were assessed, through the measurement of their efficiency scores, i.e. using DEA´s (Data Envelopment Analysis) Constant and Variable Returns to Scale (CRS and VRS) and Super efficien
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22

Chaves, Maria Teresa de Lima Hilário. "Previsão de valores residuais de automóveis." Master's thesis, 2006. http://hdl.handle.net/10400.5/18789.

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Instituto Superior de Economia e Gestão<br>A importância estratégica dos valores residuais de automóveis usados, ligeiros de passageiros, para certos ramos da economia como a gestão de frotas, rent-a-car e companhias seguradoras motivou a escolha do tema desta tese. Assim, formalizou-se um modelo econométrico que define o valor esperado dos residuais, condicionado nas variáveis explicativas. A sua concepção teve como referências as teorias das Regressões Hedónicas e do Capital Asset Price Model. As questões econométricas que surgem prendem-se com a existência de uma variável dependente f
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23

Stocker, Toni Clemens [Verfasser]. "On the asymptotic properties of the OLS estimator in regression models with fractionally integrated regressors and errors / vorgelegt von Toni Clemens Stocker." 2008. http://d-nb.info/989230317/34.

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