Opinions on legislation and judiciary in the Netherlands / job satisfaction / opinions on management of harbour installations / opinions on and knowledge of penalties for small thefts in the harbour / motivations for not stealing / perception of frequency of certain thefts / policy of management regarding theft / consequences of punishment / known cases / communication / opinions on position of workers in society / trade union policy / general normative behaviour regarding the law / contacts at work. Background variables: basic characteristics/ residence/ household characteristics/ occupation/employment/ education/ religion/ readership, mass media, and 'cultural' exposure/ organizational membership