Average vs marginal ROI in MMM: when to use each (and why both matter for your budget)
It’s tempting to evaluate a channel by its average ROI. If you spend $100,000 on Facebook and generate $200,000 in revenue, that 2× return looks great. But average ROI is a backward‑looking measure. It tells you how the last $100,000 performed — not how the next dollar will perform. To …
Average vs marginal ROI in MMM: when to use each (and why both matter for your budget) Read More »