Glenn Fleishman writing for the Economist:
The public domain is a catch-all term for material outside of the strictures of reproductive limits, or for which rights were formally foresworn. The centre promotes a balance between a creator's and the public's interest, says Duke's James Boyle. Mr Boyle, one of the drafters of the set of liberal copyright assignment licences known as Creative Commons, invokes countless studies arguing that tight copyright makes sense over short periods, to encourage creative endeavour, but can be counterproductive if extended too far. Yet rightsholders lobby for greater control (and legislators often oblige them) "even when it turns out that it hurts their interest," says Mr Boyle.