Simpson's Paradox in Measuring Net Dollar Retention Rate
Tom Tunguz
FEBRUARY 2, 2020
Net Dollar Retention is one of the most important metrics is a SaaS business. It measures the value of a cohort of customers over time including expansion, cross-sell, and churn (loss of revenue). But how do you measure NDR? Imagine this is your company’s data. The first column is the cohort month for each cohort in a year. The second column is the revenue of this cohort in their first month.
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