Template-Type: ReDIF-Paper 1.0 Author-Name: Richard Schmidtke Author-X-Name-First: Richard Author-X-Name-Last: Schmidtke Title: Private Provision of a Complementary Public Good Abstract: For several years, an increasing number of ¯rms are investing in Open Source Software (OSS). While improvements in such a non- excludable public good cannot be appropriated, companies can bene¯t indirectly in a complementary proprietary segment. We study this incentive for investment in OSS. In particular we ask how (1) market entry and (2) public investments in the public good a®ects the ¯rms' production and pro¯ts. Surprisingly, we ¯nd that there exist cases where incumbents bene¯t from market entry. Moreover, we show the counter-intuitive result that public spending does not necessarily lead to a decreasing voluntary private contribution. Length: 39 pages Creation-Date: 2006-06 File-URL: http://www.bgpe.de/texte/DP/004_schmidtke.pdf File-Format: Application/pdf File-Function: First version, 2006 Number: 004 Classification-JEL: C72, L13, L86 Keywords: Open Source Software, Private Provision of Public Goods, Cournot- Nash Equilibrium, Complements, Market Entry Handle: RePEc:bav:wpaper:004_schmidtke