@inbook {33992, title = {Why Hackers Do What They Do: Understanding Motivation and Effort in Free/Open Source Software Projects.}, booktitle = {Perspectives on Free and Open Source Software}, year = {2005}, publisher = {MIT Press}, organization = {MIT Press}, address = {Cambridge}, author = {Karim Lakhani and Robert Wolf}, editor = {Joesph Feller and Brian FitzGerald and Scott Hissam and Karim Lakhani} }