Treatment spillovers and interference between study units

Knowledge package outline

Topic

Experimentation scientific reasoning and research methods

Purpose

Explains why an untreated comparison group may be indirectly affected by another unit receiving an intervention.

Package contents

Synthetic interaction networks; direct versus indirect effect diagrams; exposure-mapping alternatives; no-interference assumption failures and identification limits.

Dependencies

Counterfactuals; random assignment; research ethics review; no real interventions.