Concerning case variety, Gary King, Robert Keohane, and Sidney Verba alert against "selecting within the dependent variable". They argue for instance that scientists simply cannot make valid causal inferences about war outbreaks by only investigating scenarios wherever war did materialize (the researcher should also examine cases in which war didn't https://manuelkmzyd.elbloglibre.com/29817356/a-review-of-ivey-case-study-analysis