The Magic Cauldron is an essay by Eric S. Raymond on the open source economic model.     The Cathedral and Bazaar in 1999.  It can be read freely online, and was published in his book.
The essay analyzes the economic models Raymond Believes That can sustain open-source project in year four steps:  
- It first analyzes what the author sees as classical myths about the cost refund in software development and tries to present a game-theory based on the assumption of stability of open-source cooperation.
- Secondly, it presents nine theoretical models that would work for sustainable open-source development: two non-profit, seven for-profit.
- Thirdly it states a theory to decide when it is economically interesting for software to remain closed.
- Finally, it examines some mechanisms that, according to Raymond, the market invented to fund for-profit open-source development (like patronage system and task markets). 
- Raymond, Eric S. (2001). “The Magic Cauldron” . The Cathedral and the Bazaar (Paperback ed.). O’Reilly . ISBN 0-596-00108-8 .
- Raymond, Eric S. (6 November 1999). “The Magic Cauldron” . Retrieved 21 March 2016 .
- Revenge of the Hackers
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