How many business models are there really? Jim reckons there are only 40 or 45 that actually work—plus a lot of Frankenstein models that aren't coherent. We look at a few favourites, some only available to big companies like the growth share matrix model, and some that apply to startups too, like time profit.

- Growth share matrix model: https://www.bcg.com/publications/2014/growth-share-matrix-bcg-classics-revisited

- Experience curve model: https://hbr.org/1985/03/building-strategy-on-the-experience-curve

- Time Profit model: https://artofprofitability.wordpress.com/2014/02/16/model-5-time-profit-model/

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