In addition, they find support for the productivity theory when they use the number of victims per
terrorist incident, a measure of terrorist brutality, as their dependent variable.
Choi focuses on the relationship between terrorism and economic growth. He breaks down economic
growth into the two components of agricultural sector economic growth and industrial sector economic
growth, with the belief that it is industrial economic growth, not agricultural economic growth that is
really relevant for terrorism (Choi, 2015).