Difference-in-Differences
Definition
An analytics concept defining statistical methods used to estimate relationships, evaluate interventions, and generate forecasts. It specifies data requirements, estimation procedures, and uncertainty measures used to support decision-making. It does not prove causation without an appropriate identification strategy, data quality checks, and sensitivity analysis.
Difference-in-Differences
Definition
A quasi‑experimental estimation technique that identifies a treatment effect by comparing changes in outcomes over time between a treated group and a control group, attributing the differential change to the treatment under the parallel trends assumption and other identifying conditions.