American Economic Association. International Society for Ecological Economics.
Head of Section, Bureau(s) of Statistics, International Labor Organization/Office since 1987. Project(s) Manager, Bureau of Statistics, International Labour Organization, Geneva, 1984-1987. Head of Rch, Spatial Data Project(s), Norwegian Computing Center, Norway, 1981-1984.
Head of Division, Labour, Environmental & Regional Statistics, 1974-1981, Rch Officer, Department of Economic & Socio-Demographic Rch, 1968-1974, Central Bureau of Statistics, Norway.