Icke et al. focused on governance structures in industrial corporations in the Netherlands. They collected data about 97 Dutch industrial and commercial corporations for the year 1993. These 97 corporations were part of the 100 largest Dutch corporations, ranked by assets. Icke et al. primarily focused on biographical data of executive directors of these 97 corporations. They used different sources for this information. For each corporation the database contains information about the sector in which it operates and the city where it was located.