Ringberg U, Fleten N, Førde OH. Examining the variation in GPs’ referral practice: a cross-sectional study of GPs’ reasons for referral. British Journal of General Practice 2014;64:e426-e33.
Graverholt B, Riise T, Jamtvedt G, Husebo BS, Nortvedt MW. Acute hospital admissions from nursing homes: predictors of unwarranted variation? Scandinavian Journal of Public Health 2013;41:359-65.
Grytten J, Skau I, Sørensen R. Do Mothers Decide? The Impact of Preferences in Healthcare J. Human Resources Winter 2013 vol. 48 no. 1 142-168
Dobloug A, Grytten J, Holst D. Dentist-specific variation in diagnosis of caries - a multilevel analysis. 2014 Apr;42(2):185-91.
Grytten J, Monkerud L, Sørensen R. Adoption of diagnostic technology and variation in caesarean section rates: a test of the practice style hypothesis in Norway. Health services research 2012;47:2169-89.
Lysdahl KB, Borretzen I. Geographical variation in radiological services: a nationwide survey. BMC Health Services Research 2007; 7:21.
Grytten J, Sorensen R. Practice variation and physician-specific effects. Journal of Health Economics 22(3): 403-418.