Choosing a Control Group in a RCT with Multiple Treatment Periods

Came across a fun little problem over the past few weeks that is related to the topic of policy impact evaluation - a long time interest of mine! Here’s the setting: we have a large population of individuals and a number of treatments that we want to gauge the effectiveness of. The treatments are not necessarily the same but are targeted towards certain sub-segments in the population. Examples of such situations include online ad targeting or marketing campaigns. [Read More]