Knut Reidar Wangen

• Abrahamsen, Cathrine; Reme, Silje Endresen; Wangen, Knut Reidar; Lindbæk, Morten & Werner, Erik Lønnmark (2023). The effects of a structured communication tool in patients with medically unexplained physical symptoms: a cluster randomized trial. EClinicalMedicine. ISSN 2589-5370. doi: 10.1016/j.eclinm.2023.102262. Full text in Research Archive
• Njie, Hassan; Ilboudo, Patrick Christian Gueswende; Gopinathan, Unni; Chola, Lumbwe & Wangen, Knut Reidar (2023). Preferences of healthcare workers for provider payment systems in The Gambia’s National Health Insurance Scheme. BMC Health Services Research. ISSN 1472-6963. 23(853). doi: 10.1186/s12913-023-09885-8. Full text in Research Archive
• Ahmed, Md Montasir; Muhoozi, Grace Kyamazima Mehangye; Atukunda, Prudence; Westerberg, Ane Cecilie; Iversen, Per Ole & Wangen, Knut Reidar (2023). Cognitive development among children in a low-income setting: Cost-effectiveness analysis of a maternal nutrition education intervention in rural Uganda. PLOS ONE. ISSN 1932-6203. 18(8). doi: 10.1371/journal.pone.0290379. Full text in Research Archive
• Trent, Pernille Kristina Bjerre; Nordskar, Nina Jebens; Wangen, Knut Reidar; Engeskaug, Ida; Opheim, Linn Øvstebø & Aune, Guro [Show all 10 contributors for this article] (2023). Self-reported lower extremity lymphedema and quality of life after surgical staging of endometrial carcinoma: A population based cross-sectional study. Gynecologic Oncology. ISSN 0090-8258. 175, p. 72–80. doi: 10.1016/j.ygyno.2023.05.070. Full text in Research Archive
• Hansen, Johan Andre Liseth; Fast, Thomas & Wangen, Knut Reidar (2023). Productivity Loss Across Socioeconomic Groups Among Patients With Low Back Pain or Osteoarthritis: Estimates Using the Friction-Cost Approach in Norway. PharmacoEconomics (Auckland). ISSN 1170-7690. doi: 10.1007/s40273-023-01269-4.
• Draganic, Dajana & Wangen, Knut Reidar (2023). The effect of physician density on colorectal cancer stage at diagnosis: causal inference methods for spatial data applied on regional-level data. International Journal of Health Geographics. ISSN 1476-072X. 22(1). doi: 10.1186/s12942-023-00323-w. Full text in Research Archive
• Yang, Fan; Wangen, Knut Reidar; Victor, Mattias Erik; Solbakken, Ole Andre & Holman, Per Arne (2022). Referral assessment and patient waiting time decisions in specialized mental healthcare: an exploratory study of early routine collection of PROM (LOVePROM). BMC Health Services Research. ISSN 1472-6963. 22(1). doi: 10.1186/s12913-022-08877-4. Full text in Research Archive
• Njie, Hassan; Wangen, Knut Reidar; Chola, Lumbwe; Gopinathan, Unni; Mdala, Ibrahimu & Sundby, Johanne Sommerschild [Show all 7 contributors for this article] (2022). Willingness to pay for a national health insurance scheme in The Gambia: A contingent valuation study. Health Policy and Planning. ISSN 0268-1080. 38(1), p. 61–73. doi: 10.1093/heapol/czac089. Full text in Research Archive
• Vibeto, Jon Hjellum; Vallersnes, Odd Martin; Dobloug, Andrea; Brekke, Mette; Jacobsen, Dag & Ekeberg, Øivind [Show all 7 contributors for this article] (2021). Treating patients with opioid overdose at a primary care emergency outpatient clinic: a cost-minimization analysis. Cost Effectiveness and Resource Allocation. ISSN 1478-7547. 19(1), p. 1–12. doi: 10.1186/s12962-021-00303-6. Full text in Research Archive
• Sjølie, Hanne Kathrine; Wangen, Knut Reidar; Lindstad, Berit Hauger & Solberg, Birger (2019). The importance of timber prices and other factors for harvest increase among nonindustrial private forest owners. Canadian Journal of Forest Research. ISSN 0045-5067. 49(5), p. 543–552. doi: 10.1139/cjfr-2018-0292. Full text in Research Archive
• Wangen, Knut Reidar; Zhu, Dawei & Wang, Jian (2018). Hepatitis B vaccination among 1997-2011 birth cohorts in rural China: the potential for further catch-up vaccination and factors associated with infant coverage rates. Human Vaccines & Immunotherapeutics. ISSN 2164-5515. doi: 10.1080/21645515.2018.1520582. Full text in Research Archive
• Wangen, Knut Reidar & Grepperud, Sverre (2018). Supply factors as determinants of treatment costs: clinicians’ assessments of a given set of referrals to community mental health centers in Norway. BMC Health Services Research. ISSN 1472-6963. 18(60). doi: 10.1186/s12913-018-2884-5. Full text in Research Archive
• Zheng, Juan; Li, Quan; Wang, Jian; Zhang, Guojie & Wangen, Knut Reidar (2017). Inequality in the hepatitis B awareness level in rural residents from 7 provinces in China. Human Vaccines & Immunotherapeutics. ISSN 2164-5515. 13(5), p. 1005–1013. doi: 10.1080/21645515.2016.1265714. Full text in Research Archive
• Zhu, Dawei; Guo, Na; Wang, Jian; Nicholas, Stephen; Wang, Zhen & Zhang, Guojie [Show all 8 contributors for this article] (2017). Socioeconomic inequality in Hepatitis B vaccination of rural adults in China. Human Vaccines & Immunotherapeutics. ISSN 2164-5515. 14(2), p. 464–470. doi: 10.1080/21645515.2017.1396401. Full text in Research Archive
• Klitkou, Søren Toksvig & Wangen, Knut Reidar (2017). Educational attainment and differences in relative survival after acute myocardial infarction in Norway: a registry-based population study. BMJ Open. ISSN 2044-6055. doi: 10.1136/bmjopen-2016-014787. Full text in Research Archive
• Mokienko, Anastasia & Wangen, Knut Reidar (2016). Disenrollment from general practitioners among chronic patients: a register-based longitudinal study of Norwegian claims data. BMC Family Practice. ISSN 1471-2296. 17(1), p. 1–10. doi: 10.1186/s12875-016-0571-3. Show summary

  Background Norwegian general practitioners (GPs) consult on a variety of conditions with a mix of patient types. Patients with chronic diseases benefit from appropriate continuity of care and generally visit their GPs more often than the average patient. Our aim was to study disenrollment patterns among patients with chronic diseases in Norway, because such patterns could indicate otherwise unobserved GP quality. For instance, higher quality GPs could have both a greater share of patients with chronic diseases and lower disenrollment rates. Methods Data on 384,947 chronic patients and 3,974 GPs for the years 2009–2011 were obtained from national registers, including patient and GP characteristics, disenrollment data, and patient list composition. The birth cohorts from 1940 and 1970 (146,906 patients) were included for comparison. Patient and GP characteristics, comorbidity, and patient list composition were analyzed using descriptive statistics. Patients’ voluntary disenrollment was analyzed using logistic regression models. Results The GPs’ proportion of patients with a given chronic disease varied more than expected when the allocation was purely random. The proportions of patients with different chronic diseases were positively correlated, partly due to comorbidity. Patients tended to have lower disenrollment rates from GPs who had higher shares of patients with the same chronic disease. Disenrollment rates were generally lower from GPs with higher shares of patients with arthritis or depression, and higher from GPs who had higher shares of patients with diabetes type 1 and schizophrenia. This was the same in the comparison group. Conclusion Patients with a chronic disease appeared to prefer GPs who have higher shares of patients with the same disease. High shares of patients with some diseases were also negatively associated with disenrollment for all patient groups, while other diseases were positively associated. These findings may reflect the GPs’ general quality, but could alternatively result from the GPs’ specialization in particular diseases. The supportive findings for the comparison group make it more plausible that high shares of chronic patients could indicate GP quality. Keywords Chronic patients – Switching – Primary health care – Schizophrenia – Epilepsy – Diabetes type 1 – Diabetes type 2 – Asthma – Arthritis – Depression

• Liu, Rugang; Li, Youwei; Wangen, Knut Reidar; Maitland, Elizabeth; Nicholas, Stephen & Wang, Jian (2016). Analysis of hepatitis B vaccination behavior and vaccination willingness among migrant workers from rural China based on protection motivation theory. Human Vaccines & Immunotherapeutics. ISSN 2164-5515. 12(5), p. 1155–1163. doi: 10.1080/21645515.2015.1123358.
• Chen, Rouhan; Li, Youwei; Wangen, Knut Reidar; Nicholas, Stephen; Maitland, Elizabeth & Wang, Jian (2016). Hepatitis B birth dose vaccination rates among children in Beijing: A comparison of local residents and first and second generation migrants. Human Vaccines & Immunotherapeutics. ISSN 2164-5515. 12(5), p. 1141–1148. doi: 10.1080/21645515.2015.1131370.
• Yu, Lijie; Wang, Jian; Wangen, Knut Reidar; Chen, Ruohan; Maitland, Elizabeth & Nicholas, Stephen (2016). Factors associated with adults' perceived need to vaccinate against hepatitis B in rural China. Human Vaccines & Immunotherapeutics. ISSN 2164-5515. 12(5), p. 1149–1154. doi: 10.1080/21645515.2015.1132964.
• Leng, Anli; Li, Youwei; Wangen, Knut Reidar; Nicholas, Stephen; Maitland, Elizabeth & Wang, Jian (2016). Hepatitis B discrimination in everyday life by rural migrant workers in Beijing. Human Vaccines & Immunotherapeutics. ISSN 2164-5515. 12(5), p. 1164–1171. doi: 10.1080/21645515.2015.1131883.
• Yu, Lijie; Wang, Jian; Zhu, Dawei; Leng, Anli & Wangen, Knut Reidar (2015). Hepatitis B-related knowledge and vaccination in association with discrimination against Hepatitis B in rural China. Human Vaccines & Immunotherapeutics. ISSN 2164-5515. doi: 10.1080/21645515.2015.1069932.
• Grepperud, Sverre; Holman, Per Arne & Wangen, Knut Reidar (2014). Factors explaining priority setting at community mental health centres: a quantitative analysis of referral assessments. BMC Health Services Research. ISSN 1472-6963. 14, p. 620–623. doi: 10.1186/s12913-014-0620-3.
• Zhu, Dawei; Jian, Wang & Wangen, Knut Reidar (2014). Hepatitis B vaccination coverage rates among adults in rural China: Are economic barriers relevant? Vaccine. ISSN 0264-410X. 32(49), p. 6705–6710. doi: 10.1016/j.vaccine.2013.06.095.
• Alstadsæter, Annette & Wangen, Knut Reidar (2010). Small corporations' income shifting through choice of ownership structure - A Norwegian case. Finnish economic papers. ISSN 0784-5197. 23(2), p. 73–87.
• Bolkesjø, Torjus Folsland; Solberg, Birger & Wangen, Knut Reidar (2007). Heterogeneity in nonindustrial private roundwood supply: Lessons from a large panel of forest owners. Journal of Forest Economics. ISSN 1104-6899. 13(1), p. 7–28. doi: 10.1016/j.jfe.2006.08.003.
• Wangen, Knut Reidar & Biørn, Erik (2006). How Do Consumers Switch Between Close Substitutes when Price Variation is Small? The Case of Cigarette Types. Spanish Economic Review. ISSN 1435-5469. 8(4), p. 239–253. Show summary

  Past empirical studies report ambiguous results regarding the magnitude and significance of substitution between different types of smoking tobacco. Since all types of tobacco contain nicotine this is quite surprising. Using a twenty-year rotating panel data set of Norwegian households and a multinomial logit model, we find evidence that consumers switch between tobacco types: first, estimated price effects on choice probabilities have mostly expected signs, albeit their statistical significance vary across different metrics, second, household characteristics affect tobacco composition significantly. These findings suggest that consumers' choices are `locked' when the relative price variation is small, as has been the case in most of the data period, but that larger changes could induce large-scale switching between tobacco types. Our conjecture is that there is a latent potential for switching, which will become manifest if prices change sufficiently. Similar considerations are likely to have relevance for other close substitutes.

• Biørn, Erik; Skjerpen, Terje & Wangen, Knut Reidar (2006). Can Random Coefficient Cobb-Douglas Production Functions be Aggregated to Similar Macro Functions? In Baltagi, Badi (Eds.), Panel Data Econometrics: Theoretical Contributions and Empirical Applications. Elsevier. ISSN 0-444-52172-0. p. 229–258. doi: 10.1016/S0573-8555(06)74009-3.

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• Trent, Pernille Kristina Bjerre; Nordskar, Nina Jebens; Wangen, Knut Reidar; Engeskaug, Ida; Opheim, Linn Øvstebø & Aune, Guro [Show all 10 contributors for this article] (2024). Corrigendum to “Self-reported lower extremity lymphedema and quality of life after surgical staging of endometrial carcinoma: A population based cross-sectional study” [Gynecologic Oncology 175 (2023) 72–80, (S0090825823003232), (10.1016/j.ygyno.2023.05.070)]. Gynecologic Oncology. ISSN 0090-8258. 183, p. 7–8. doi: 10.1016/j.ygyno.2024.02.026.
• Vibeto, Jon Hjellum; Vallersnes, Odd Martin; Dobloug, Andrea; Brekke, Mette; Jacobsen, Dag & Ekeberg, Øivind [Show all 7 contributors for this article] (2020). Treating patients with opioid overdose at a primary care emergency outpatient clinic: a cost-minimization analysis.
• Sjølie, Hanne Kathrine; Wangen, Knut Reidar; Lindstad, Berit Hauger & Solberg, Birger (2016). The importance of timber prices for harvest increase among active and inactive nonindustrial private forest owners in Norway. Scandinavian Forest Economics. ISSN 0355-032X. 46, p. 105–105.
• Mokienko, Anastasia & Wangen, Knut Reidar (2015). Chronic patients and choice of GP.
• Mokienko, Anastasia & Wangen, Knut Reidar (2015). GP switching and composition of the lists.
• Wangen, Knut Reidar (2011). To what extent do user fees affect Hepatitis B vaccine coverage rates in China?
• Biørn, Erik & Wangen, Knut Reidar (2009). Limited Dependent Variables Models: Reconsidering the Typology and a Suggested Synthesis.
• Alstadsæter, Annette & Wangen, Knut Reidar (2008). Corporations' choice of tax regime when transition costs are small and income shifting potential is large.
• Alstadsæter, Annette & Wangen, Knut Reidar (2008). Selskapers skattetilpasning ved hjelp av eierstruktur.
• Alstadsæter, Annette & Wangen, Knut Reidar (2007). Evidence on Corporations' Choice of Tax Regime when Transition Costs are Small.
• Biørn, Erik & Wangen, Knut Reidar (2012). New Taxonomies for Limited Dependent Variables Models. Munich Personal RePEc Archive. Show summary

  We establish a `map' for describing a wide class of Limited Dependent Variables models much used in the econometric literature. The classification system, or language, is an extension of Amemiya's typology for tobit models and is intended to facilitate communication among researchers. The class is defined in relation to distributions of latent variables of an arbitrarily high dimension; the region of support can be divided into an arbitrary number of subsets, and the observation rules in each subset can be any combination of the observed, censored, and missing status. Consistent labeling is suggested at different levels of detail.

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