We examine the generalizability of internally valid estimates of causal effects in a fixed population over time when that population is subject to aggregate shocks. This temporal external validity is shown to depend upon the distribution of the aggregate shocks and the interaction between these...

Despite the surge in quantitative research examining the link between climate variability and conflict, a lot of uncertainty exists concerning whether there is a link. One shortcoming of the current literature is that it focuses mainly on statistical inference in order to establish causation...