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Knowledge overview
Black market work is done by one in five Danes and costs the state billions
October 2025
Research report
Undeclared Work in Denmark 2021: Extent, Characteristics, and Lost Tax Revenue
Workplace Amenities and the Gender Pay Gap
December 2025
The majority of Danes buy undeclared services
March 2011
Does the Marginal Tax Rate Affect Activity in the Informal Sector?
May 2014
Refugee Migration and the Labor Market: Lessons from 40 Years of Post-arrival Policies in Denmark
March 2022
Evaluating the Trade-Offs in Tax and Transfer Policy: Theory and Danish Evidence
November 2006
The Shadow Economy in Germany, Great Britain and Scandinavia
April 2003
Book
Welfare State and Population in Denmark Germany and the UK
July 2022
Black Activities in Germany in 2001 and in 2004. A Comparison Based on Survey Data
June 2005
Local Labour Demand and Immigrant Employment
November 2018
“Black” Activities Low in Germany in 2006
March 2008
Measuring the Trend in Police Tasks Concerning People with Mental Health Challenges in Denmark, 2008-2022
March 2025
Undeclared work decreasing in Germany
June 2012
Estimates of the Shadow Economy in Denmark
Estimater af skyggeøkonomien i Danmark
November 2022
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