Birgir Hrafnkelsson, Associate Professor of Statistics at Univerisity of Iceland

Publications - refereed journals

·         Sigurdarson, A. N. and Hrafnkelsson, B. (2016) Bayesian prediction of monthly precipitation on a fine grid using covariates based on a regional meteorological model. Environmetrics, 27(1), 27-41.

·         Olafsdottir, T., Hrafnkelsson, B., Thorgeirsson, G. and Asgeirsdottir, T. L. (2016) The tax-free year in Iceland: A natural experiment to explore the impact of a short-term increase in labor supply on the risk of heart attacks. Journal of Health Economics, 49, 14-27.

·         Hrafnkelsson, Birgir; Oddsson, Gudmundur V.; Unnthorsson, Runar. (2016) A Method for Estimating Annual Energy Production Using Monte Carlo Wind Speed Simulation. Energies, 9(4), no. 286.

·         Geirsson, O. P., Hrafnkelsson, B. and Simpson, D. (2015) Computationally efficient spatial modeling of annual maximum 24-h precipitation on a fine grid. Environmetrics, 26(5), 339-353.

·         Ragnarsson, B. F., Oddsson, G. V., Unnthorsson, R. and Hrafnkelsson, B. (2015) Levelized cost of energy analysis of a wind power generation system at Búrfell in Iceland. Energies, 8(9), 9464-9485.

·         Olafsdottir, T., Hrafnkelsson, B. and Asgeirsdottir, T. L. (2015) The Icelandic economic collapse, smoking, and the role of labor-market changes.  European Journal of Health Economics, 16(4), 391-405.

·         Sigurdsson, S., Kristinsson, K. G., Erlendsdottir, H., Hrafnkelsson, B. and Haraldsson, A. (2015) Decreased Incidence of Respiratory Infections in Children After Vaccination with Ten-valent Pneumococcal Vaccine.The Pediatric Infectious Disease Journal, 34(12), 1385-1390.  

·         Jonsdottir, H., Amundadottir, O. R., Gudmundsson, G., Halldorsdottir, B. S., Hrafnkelsson, B., Ingadottir, T. S., Jonsdottir, R., Jonsson, J. S., Ellen D. Sigurjonsdottir, E. D., and Stefansdottir, I. K. (2015) Effectiveness of a partnership-based self-management programme for patients with mild and moderate chronic obstructive pulmonary disease: a pragmatic randomized controlled trial. Journal of Advanced Nursing, 71(11), 2634-2649. 

·         Gudnason, T., Hrafnkelsson, B., Laxdal, B. and Kristinsson, K. G. (2014) Risk factors for nasopharyngeal carriage of Streptococcus pneumoniae and effects of a hygiene intervention: repeated cross-sectional cohort study at day care centres. Scandinavian Journal of Infectious Disease, 46(7), 493-501.

·         Geirsson, O. P., Gunnarsdottir, O. S., Baldursson, J., Hrafnkelsson, B. and Rafnsson, V. (2013) Risk of repeat visits, hospitalisation and death after uncompleted and completed visits to the emergency department: a prospective observation study. Emergency Medicine Journal, 30(8), 662-668.

·         Gudnason, T., Hrafnkelsson, B., Laxdal, B. and Kristinsson, K. G. (2013) Does hygiene intervention at day care centres reduce infectious illnesses in children? An intervention cohort study. Scandinavian Journal of Infectious Disease, 45(5), 397-403.

·         Hrafnkelsson, B., Ingimarsson, K. M., Gardarsson, S. M. and Snorrason, A. (2012) Modeling discharge rating curves with Bayesian B-splines. Stochastic Environmental Research and Risk Assessment, 26(1), 1-20.

·         Hrafnkelsson, B., Morris, J. and Baladandayuthapani, V. (2012) Spatial modeling of annual minimum and maximum temperatures in Iceland. Meteorology and Atmospheric Physics, 116(1-2), 43-61.

·         Carlsen, H. K., Zoëga, H., Valdimarsdóttir, U., Gíslason, Þ. and Hrafnkelsson, B. (2012) Hydrogen sulfide and urban air pollution levels associated with increased dispensing of anti-asthma drugs in Iceland's capital. Environmental Research, 113, 33-39.

·         Gudnason, T., Hrafnkelsson, B., Laxdal, B. and Kristinsson K. G. (2012) Can risk factors of infectious illnesses in children at day care centres be identified? Scandinavian Journal of Infectious Diseases, 44(2), 149-156.

·         Georgsdottir, I., Erlingsdottir. G., Hrafnkelsson, B. Haraldsson, A. and Dagbjartsson, A. (2012) Disabilities and health of extremely low birth weight-teenagers - a population based study. Acta Pædiatrica, 101(5), 518-523.

·         Finnbogadottir, A. F., Ardal, B., Eiriksson, H., Hrafnkelsson, B., Valdimarsson, H., Ludviksson, B. R. and Haraldsson, A. (2012) A long term follow-up of allergic diseases in Iceland. Pediatric Allergy and Immunology, 23(2), 181-185.

·         Sveinbjarnardottir, E. K., Svavarsdottir, E. K., and Hrafnkelsson, B. (2012) Psychometric Development of the Iceland-Family Perceived Support Questionnaire (ICE-FPSQ). Journal of Family Nursing, 18(3), 328-352.

·         Sveinbjarnardottir, E. K., Svavarsdottir. E. K. and Hrafnkelsson, B. (2012) Psychometric development of the Iceland-Expressive Family Functioning Questionnaire (ICE-EFFQ). Journal of Family Nursing, 18(3), 353-377.

·         Hrafnkelsson, B., Helgason, A., Jonsson, G. F., Gudbjartsson, D. F., Jonsson, T., Thorvaldsson, S., Stefansson, H., Steinthorsdottir, V., Vidarsdottir, N., Middleton, D., Petersen, H. S., Martinez, C., Snaedal, J., Jonsson, P. V., Bjornsson, S., Gulcher, J. R. and Stefansson, K. (2010) Evaluating differences in linkage disequilibrium between populations. Annals of Human Genetics, 74(3), 233-247.

·         Margeirsson, S., Hrafnkelsson, B., Jonsson, G. R., Jensson, P. and Arason, S. (2010) Utilization of data recording in the cod industry for decision making based on statistical analysis of value chain data, Journal of Food Engineering, 99(2), 151-158

·         Zoega, H., Baldursson, G., Hrafnkelsson, B., Almarsdottir, A. B., Valdimarsdottir, U., Halldorsson, M. (2009) Psychotropic Drug Use among Icelandic Children: A Nationwide Population-Based Study. Journal of Child and Adolescent Psychopharmacology, 19(6), 757-764.

·         Zoega, H., Baldursson, G., Hrafnkelsson, B., Almarsdottir, A. B., Valdimarsdottir, U., Halldorsson, M. (2009) Extensive psychotropic drug use among Icelandic children: A nationwide population based study. Pharmacoepidemiology and Drug Safety, 18, S203-S203.

·         Babak, O., Hrafnkelsson, B. and Palsson, O. P. (2007) Estimation of the length distribution of marine populations in the Gaussian-multinomial setting using the method of moments. Journal of Applied Statistics, 34(8), 985-995.

·         Helgason, A., Palsson, S., Lalueza-Fox, C., Ghosh, S., Sigurdardottir, S., Baker, A., Hrafnkelsson, B., Arnadóttir, L., Thorsteinsdottir, U., and Stefansson, K. (2007) A statistical approach to identify ancient template DNA. Journal of Molecular Evolution, 65(1), 92-102

·         Helgason, A., Yngvadottir, B., Hrafnkelsson, B., Gulcher, J. R. and Stefansson, K. (2005) An Icelandic example of the impact of population structure on association studies. Nature Genetics, 37(1), 90-95

·         Hrafnkelsson, B. and Stefansson, G. (2004) A model for categorical length data from groundfish surveys. Canadian Journal of Fisheries and Aquatic Sciences, 61(7), 1135-1142.

·         Helgason, A., Hrafnkelsson, B., Gulcher, J. R., Ward, R. and Stefansson, K. (2003) A population-wide coalescent analysis of Icelandic matrilineal and patrilineal genealogies: Determining the evolutionary rates of mtDNA and Y-chromosome lineages. The American Journal of Human Genetics, 72(6), 1370-1388.

·         Hrafnkelsson, B. and Cressie, N. (2003) Hierarchical modeling of count data with application to nuclear fall-out. Environmental and Ecological Statistics, 10(2), 179-200.

·         Hrafnkelsson, B. and Newton, H.J. (2000). Asymptotic simultaneous confidence bands for vector autoregressive spectra. Biometrika, 87(1), 173-182.

·         Jonsson, G. R., Jonsson, V. K., Palsson, O. P. and Hrafnkelsson, B. (1998). Estimation of extreme mass flowrate in district heating systems. Proceedings of the Institution of Mechanical Engineers, Part A, Journal of Power and Energy, 212(A2), 125-133.

Publications – submitted to arXiv

·         Geirsson, O.P., Hrafnkelsson, B., Simpson D. and Sigurðarson H. (2015) The MCMC split sampler: A block Gibbs sampling scheme for latent Gaussian models. arXiv preprint arXiv:1506.06285v1.

Publications – refereed Icelandic journals

·         Birgir Hrafnkelsson og Gunnar Stefánsson. (2003) Mat á lengdardreifingum. Tímarit um raunvísindi og stærðfræði, 1. árg. 2. hefti, 45-55.

·         Snorri Árnason, Birgir Hrafnkelsson og Ólafur P. Pálsson (2005) Mat á rennslislyklum og rennsli með bayesískri tölfræði. Árbók VFÍ 2005, 209-217.

Publications – book chapters

·         Margeirsson, S., Jonsson, G., R., Arason, S., Thorkelsson, G., Sigurgisladottir, S., Hrafnkelsson, B. and Jensson, P. (2007) Food Engineering Trends - Icelandic View. In the book: Food engineering Research Developments. Edited by Terrance P. Klening. Hauppauge NY, Nova Science Publishers Inc. pp. 1-24.

Publications - refereed conference papers

·         Ingimarsson, K. M., Hrafnkelsson, B., Gardarsson, S. M. and Snorrason, A. (2008) Bayesian estimation of discharge rating curves. XXV Nordic Hydrological Conference, pp. 308-317. Nordic Association for Hydrology. Reykjavik, August 11-13, 2008.

Publications - unrefereed conference papers

·         Cressie, N., Wendt, D. A., Johannesson, G., Mugglin, A. S. and Hrafnkelsson, B. (2003) A spatio-temporal statistical approach to problems in command and control. Proceedings of the Sixth Annual U.S. Army Conference on Applied Statistics, Houston 18-20 October 2000. Editors Bodt, B. and Wegman, E. Army Research Laboratory, MD, pp. 170-190.