Foray, D.Mowery, D. C.Nelson, R. R.2013-03-282013-03-282013-03-28201210.1016/j.respol.2012.07.011https://infoscience.epfl.ch/handle/20.500.14299/91162WOS:000312915000001Public R&D and social challenges: What lessons from mission R&D programs?text::journal::journal article::research article