Formula
SIR model, K = i × c
Why it matters
Marketers borrow it to describe how an idea or product spreads through a network. Its key quantity, the reproduction number, corresponds to the K-factor in growth work.
Glossary // S / Epidemiology
What is SIR model?
Definition
The SIR model is an epidemiology framework that divides a population into susceptible, infected and recovered groups.