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Social network marketing: Getting from zero to critical mass | Andrew Chen (@andrewchen)
(above is a picture of fun San Francisco tradition called Critical Mass in which cyclists take over the street! Thank god I don’t drive much around the city) What does it mean to hit critical mass?How to calculate cost-per-acquisition for startups relying on freemium, subscription, or virtual items biz models | Andrew Chen (@andrewchen)
Viral and Retention Excel Model (Click to download) See this image before?
Facebook viral marketing: When and why do apps ?jump the shark?? | Andrew Chen (@andrewchen)
Lessons Learned – Viral Marketing | For Entrepreneurs
I worked with two companies in the past month that needed a way to model viral adoption as part of their effort to understand the impact of a strategic decision to deliver part or all of their technology under an opensource license. Having such model enables them to understand the critical variables and success-factors, set targets for them and then measure as they embark on their strategies. I set out to make a generic model that can at once be used at both companies.

