JHJennifer HollandFollowUsage metrics Co-workers & collaboratorsGAGunnar AnderssonProfessor of DemographyGunnar AnderssonKWKenneth Aarskaug WiikSenior researcher - OsloKenneth Aarskaug WiikB.G.Perelli-Harris@soton.ac.ukB.G.Perelli-Harris@soton.ac.uk