With regards to case collection, Gary King, Robert Keohane, and Sidney Verba warn from "choosing around the dependent variable". They argue as an example that scientists are unable to make legitimate causal inferences about war outbreaks by only taking a look at cases wherever war did take place (the researcher https://case-study-help79068.blog5star.com/30314095/the-ultimate-guide-to-harvard-case-study-writing-help