Programming Languages: Application and Interpretation, 3rd Ed
Great work.Sorry side track totally.  as part of my degree is under a Chicago School professor, who I respect but still his work find puzzling.  Can this be a counter-example … just like many others open source project.  The problem of public good i.e. those unlike fish cannot be eaten.  He went on to do work on trademark, copyright and patent.  Well copyright is what open source rely upon he would say.  But what is the incentive of doing it.  Would the total output less because of this … he would ask.The question as normal here: why not say sell it and give the money to something you like, like charity.