Viewpoint
Perens poses Open Source as a means of marketing the free software philosophy of Richard Stallman to business people who are more concerned with profit than freedom, and states that open source and free software are only two ways of talking about the same phenomenon. This differs from Stallman and Raymond. Perens postulates an economic theory for business use of Open Source in his paper The Emerging Economic Paradigm of Open Source and his speech Innovation Goes Public. This differs from Raymond's theory in The Cathedral and the Bazaar, which having been written before there was much business involvement in open source, explains open source as a consequence of programmer motivation and leisure.
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