First, subjects were surveyed on a variety of topics, including their main sources of income, attitudes towards the law, and whether they had ever broken any laws concerning limits on fishing. The survey also included questions on whether they had ever fished more than official quotas allowed. Approximately one third of respondents either admitted to overfishing, or to being charged with overfishing.
The researchers study 300 respondents in 35 communities that experienced a wide range of violent events. To identify past violence, the authors measure how many deaths communities experienced during the war, and also interview individual households about their experiences during war.