Auction and pacing simulations for ads lift
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Simulations make lift estimates cheaper by testing policies before we spend budget. They are especially useful when experimentation cycles are long or randomized control is limited.
What to simulate
- Auction outcomes: bid distributions, win rates, and clearing prices under new models.
- Pacing and budgets: how new policies change spend velocity and delivery profiles.
- Creative selection: whether creative policies skew delivery to certain cohorts or geos.
How to keep simulations honest
- Replay production traffic with realistic throttling and consent-aware analytics.
- Compare counterfactuals against holdout policies; calibrate against recent experiments.
- Capture guardrails (CPC, CPA, ROI) with the same thresholds used in rollout gates.
Related reading
- Foundational approach: Geo experiments for ads lift without slowing delivery.
- Deployment perspective: Ads ML as a subtopic of production ML systems.
- Pillar hub: Causal measurement for ads.
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