Design profit evaluation for loyalty program

A national grocery retailer rolled out a free loyalty card on January 1. You are asked to measure the incremental profit caused by enrollment over a 6-month post-enrollment window. The available data includes 18 months of household-level transaction records with item price, cost, product, store, and timestamp; membership enrollment dates; coupon redemptions; and per-household acquisition and ongoing servicing costs. Write a detailed evaluation plan that addresses: (a) Causal…