Written by: Gunnar Viby Mogensen, Hans Kurt Kvist, Eszter Körmendi and Søren Pedersen

In 1994 new surveys were carried out of the extent of the undeclared sector in Denmark, together with a study of the reliability of the interview methods used and the comparability of the results obtained across surveys at different dates. This material is presented in The Shadow Economy in Denmark, supplemented by an examination of the usefulness of other research methods.