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  • 1
    Online-Ressource
    Online-Ressource
    Foundation for Open Access Statistic ; 2012
    In:  Journal of Statistical Software Vol. 50, No. 1 ( 2012)
    In: Journal of Statistical Software, Foundation for Open Access Statistic, Vol. 50, No. 1 ( 2012)
    Materialart: Online-Ressource
    ISSN: 1548-7660
    Sprache: Englisch
    Verlag: Foundation for Open Access Statistic
    Publikationsdatum: 2012
    ZDB Id: 2010240-9
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Online-Ressource
    Online-Ressource
    Springer Science and Business Media LLC ; 2021
    In:  European Journal of Population Vol. 37, No. 3 ( 2021-07), p. 569-602
    In: European Journal of Population, Springer Science and Business Media LLC, Vol. 37, No. 3 ( 2021-07), p. 569-602
    Materialart: Online-Ressource
    ISSN: 0168-6577 , 1572-9885
    Sprache: Englisch
    Verlag: Springer Science and Business Media LLC
    Publikationsdatum: 2021
    ZDB Id: 2015429-X
    SSG: 3,4
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Online-Ressource
    Online-Ressource
    Springer Science and Business Media LLC ; 2013
    In:  Canadian Studies in Population Vol. 39, No. 3-4 ( 2013-02-14), p. 79-
    In: Canadian Studies in Population, Springer Science and Business Media LLC, Vol. 39, No. 3-4 ( 2013-02-14), p. 79-
    Kurzfassung: This paper examines adult and old-age mortality differentials in Canada between 1930 and 2007 at the provincial level, using theCanadian Human Mortality Database and the flexible smoothing P-spline method in two-dimensions well-suited to the study of smallpopulations. Our analysis reveals that provincial disparities in adult mortality in general, and among the elderly population in particular,are substantial in Canada. Moreover, based on the modal age at death and the standard deviation of ages at death above the mode,provincial disparities at older ages have barely reduced over time, despite the great mortality improvements in all provinces since the early 20th century. In the last few years studied, evidence of the shifting mortality regime was found among females in most Western and Central provinces, while all males were still undergoing an old-age mortality compression regime.
    Materialart: Online-Ressource
    ISSN: 1927-629X , 0380-1489
    Sprache: Unbekannt
    Verlag: Springer Science and Business Media LLC
    Publikationsdatum: 2013
    ZDB Id: 2245932-7
    SSG: 3,4
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Online-Ressource
    Online-Ressource
    SAGE Publications ; 2008
    In:  Statistical Modelling Vol. 8, No. 4 ( 2008-12), p. 385-401
    In: Statistical Modelling, SAGE Publications, Vol. 8, No. 4 ( 2008-12), p. 385-401
    Kurzfassung: In many applications data can be interpreted as indirect observations of a latent distribution. A typical example is the phenomenon known as digit preference, i.e. the tendency to round outcomes to pleasing digits. The composite link model (CLM) is a useful framework to uncover such latent distributions. Moreover, when applied to data showing digit preferences, this approach allows estimation of the proportions of counts that were transferred to neighbouring digits. As the estimating equations generally are singular or severely ill-conditioned, we impose smoothness assumptions on the latent distribution and penalize the likelihood function. To estimate the misreported proportions, we use a weighted least-squares regression with an added L 1 penalty. The optimal smoothing parameters are found by minimizing the Akaike’s information Criterion (AIC). The approach is verified by a simulation study and several applications are presented.
    Materialart: Online-Ressource
    ISSN: 1471-082X , 1477-0342
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2008
    ZDB Id: 2053876-5
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    Online-Ressource
    Online-Ressource
    SAGE Publications ; 2016
    In:  Statistical Modelling Vol. 16, No. 4 ( 2016-08), p. 279-296
    In: Statistical Modelling, SAGE Publications, Vol. 16, No. 4 ( 2016-08), p. 279-296
    Kurzfassung: Representing the conditional mean in Poisson regression directly as a sum of smooth components can provide a realistic model of the data generating process. Here, we present an approach that allows such an additive decomposition of the expected values of counts. The model can be formulated as a penalized composite link model and can, therefore, be estimated by a modified iteratively weighted least-squares algorithm. Further shape constraints on the smooth additive components can be enforced by additional penalties, and the model is extended to two dimensions. We present two applications that motivate the model and demonstrate the versatility of the approach.
    Materialart: Online-Ressource
    ISSN: 1471-082X , 1477-0342
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2016
    ZDB Id: 2053876-5
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    Online-Ressource
    Online-Ressource
    SAGE Publications ; 2019
    In:  Statistical Modelling Vol. 19, No. 3 ( 2019-06), p. 299-322
    In: Statistical Modelling, SAGE Publications, Vol. 19, No. 3 ( 2019-06), p. 299-322
    Kurzfassung: Regular revisions of the classification of diseases and the consequent disruptions of mortality series are well-known issues in long-term cause-of-death analysis. Given basic assumptions and medical knowledge about possible exchanges across causes of death in the revision years, redistribution of counts of causes of death into a new classification can be viewed as a constrained optimization problem. Penalized likelihood within a quadratic programming framework allows estimation of exchanges that vary smoothly over age groups. The approach is illustrated using both German data on malignant neoplasms and French data on heart diseases.
    Materialart: Online-Ressource
    ISSN: 1471-082X , 1477-0342
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2019
    ZDB Id: 2053876-5
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    In: SSM - Population Health, Elsevier BV, Vol. 14 ( 2021-06), p. 100799-
    Materialart: Online-Ressource
    ISSN: 2352-8273
    Sprache: Englisch
    Verlag: Elsevier BV
    Publikationsdatum: 2021
    ZDB Id: 2900371-4
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    Online-Ressource
    Online-Ressource
    Oxford University Press (OUP) ; 2017
    In:  Journal of the Royal Statistical Society Series C: Applied Statistics Vol. 66, No. 5 ( 2017-11-01), p. 893-918
    In: Journal of the Royal Statistical Society Series C: Applied Statistics, Oxford University Press (OUP), Vol. 66, No. 5 ( 2017-11-01), p. 893-918
    Kurzfassung: Digit preference is the habit of reporting certain end digits more often than others. If such a misreporting pattern is a concern, then measures to reduce digit preference can be taken and monitoring changes in digit preference becomes important. We propose a two-dimensional penalized composite link model to estimate the true distributions unaffected by misreporting, the digit preference pattern and a trend in the preference pattern simultaneously. A transfer pattern is superimposed on a series of smooth latent distributions and is modulated along a second dimension. Smoothness of the latent distributions is enforced by a roughness penalty. Ridge regression with an L1-penalty is used to extract the misreporting pattern, and an additional weighted least squares regression estimates the modulating trend vector. Smoothing parameters are selected by the Akaike information criterion. We present a simulation study and apply the model to data on birth weight and on self-reported weight of adults.
    Materialart: Online-Ressource
    ISSN: 0035-9254 , 1467-9876
    RVK:
    Sprache: Englisch
    Verlag: Oxford University Press (OUP)
    Publikationsdatum: 2017
    ZDB Id: 204797-4
    ZDB Id: 1482300-7
    ZDB Id: 1476894-X
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
    Online-Ressource
    Online-Ressource
    Oxford University Press (OUP) ; 2023
    In:  Biostatistics ( 2023-03-20)
    In: Biostatistics, Oxford University Press (OUP), ( 2023-03-20)
    Kurzfassung: The use of social contact rates is widespread in infectious disease modeling since it has been shown that they are key driving forces of important epidemiological parameters. Quantification of contact patterns is crucial to parameterize dynamic transmission models and to provide insights on the (basic) reproduction number. Information on social interactions can be obtained from population-based contact surveys, such as the European Commission project POLYMOD. Estimation of age-specific contact rates from these studies is often done using a piecewise constant approach or bivariate smoothing techniques. For the latter, typically, smoothness is introduced in the dimensions of the respondent’s and contact’s age (i.e., the rows and columns of the social contact matrix). We propose a smoothing constrained approach—taking into account the reciprocal nature of contacts—introducing smoothness over the diagonal (including all subdiagonals) of the social contact matrix. This modeling approach is justified assuming that when people age their contact behavior changes smoothly. We call this smoothing from a cohort perspective. Two approaches that allow for smoothing over social contact matrix diagonals are proposed, namely (i) reordering of the diagonal components of the contact matrix and (ii) reordering of the penalty matrix ensuring smoothness over the contact matrix diagonals. Parameter estimation is done in the likelihood framework by using constrained penalized iterative reweighted least squares. A simulation study underlines the benefits of cohort-based smoothing. Finally, the proposed methods are illustrated on the Belgian POLYMOD data of 2006. Code to reproduce the results of the article can be downloaded on this GitHub repository https://github.com/oswaldogressani/Cohort_smoothing.
    Materialart: Online-Ressource
    ISSN: 1465-4644 , 1468-4357
    Sprache: Englisch
    Verlag: Oxford University Press (OUP)
    Publikationsdatum: 2023
    ZDB Id: 2020601-X
    SSG: 12
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 10
    Online-Ressource
    Online-Ressource
    Duke University Press ; 2018
    In:  Demography Vol. 55, No. 3 ( 2018-06-01), p. 957-978
    In: Demography, Duke University Press, Vol. 55, No. 3 ( 2018-06-01), p. 957-978
    Kurzfassung: We propose a method to decompose the young adult mortality hump by cause of death. This method is based on a flexible shape decomposition of mortality rates that separates cause-of-death contributions to the hump from senescent mortality. We apply the method to U.S. males and females from 1959 to 2015. Results show divergence between time trends of hump and observed deaths, both for all-cause and cause-specific mortality. The study of the hump shape reveals age, period, and cohort effects, suggesting that it is formed by a complex combination of different forces of biological and socioeconomic nature. Male and female humps share some traits in all-cause shape and trend, but they also differ by their overall magnitude and cause-specific contributions. Notably, among males, the contributions of traffic and other accidents were progressively replaced by those of suicides, homicides, and poisonings; among females, traffic accidents remained the major contributor to the hump.
    Materialart: Online-Ressource
    ISSN: 0070-3370 , 1533-7790
    Sprache: Englisch
    Verlag: Duke University Press
    Publikationsdatum: 2018
    ZDB Id: 280612-5
    ZDB Id: 2010091-7
    SSG: 3,4
    Standort Signatur Einschränkungen Verfügbarkeit
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