In order to confirm the early results from the IBM study and to extend them to a variety of populations, six subsequent cross-national studies were successfully conducted between 1990 and 2002. Covering between 14 and 28 countries each, the samples included commercial airline pilots, students, civil service managers, 'up-market' consumers and 'elites'. The combined research established value scores on the four dimensions for a total of 76 countries and regions.