Simple Bass diffusion modified from Sterman Business Dynamics Ch9. Compare with the SI infectious disease model Insight 584, to which we added churn and duplicated it to model a 2 sided marketplace..
In this 2-sided market model -- take etsy for example -- the adoption rate of end users is also a factor of how many vendors the company has on-boarded. You can control the impact on end user adoption via the Choice Impact Factor.
Conversely, the rate at which vendors will be on-boarded is a factor of the perceived opportunity they have to sell their wares. You can control the rate at which suppliers are on-boarded via the Opportunity Impact Factor.
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