The New York Times:
Lifting the patent barrier to new drugs and energy sources
12 April 2016
... In the case of clean energy technology, noted a study by Professor Hall of Berkeley and Christian Helmers of the Center for Economic Performance in London, ''patent protection may not be the optimal instrument for encouraging innovation.''
This article was published by The New York Times on April 12, 2016
Link to article here
Related links
Christian Helmers webpage
Urban Programme webpage