# Post-Promo Baseline Lift

**Description:** Sustained increase in baseline sales after a promotion relative to pre-promo levels.

**Formula:** *((Post-Promo Baseline – Pre-Promo Baseline) ÷ Pre-Promo Baseline) × 100*

**SQL Calculation (simplified):**

```sql
(AVG(baseline_sales_post) - AVG(baseline_sales_pre)) / NULLIF(AVG(baseline_sales_pre),0) * 100 AS post_promo_baseline_lift
```

**Why It Matters:** Captures long-term effectiveness of promos in raising everyday demand.

**Metric Type:** Result (Strategic)

**Essence:** Lagging → Leading (predicts future baseline)

**Frequency:** After each promo (usually measured over 4–8 weeks)

**Units:** Percentage (%)

**Suggested Breakdowns:** Product, Retailer, Promo Type

**Questions Answered:**

* Did this promo permanently raise our baseline sales?
* Are we gaining lasting trial and repeat?

**Potential Causes of Worsening:** Pantry loading (baseline dip after promo), deal-seeker churn, ineffective follow-up.

**Tactics to Improve:**

* Target promos to new buyers
* Follow-up loyalty campaigns
* Manage pantry loading

**Related Metrics:**

* Incrementality %
* Lift Sustainability Score

**Related Explores:**

* Longitudinal Promo Analysis

**Related Sources:**

* URMS baseline data
* Syndicated promo performance


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