@article{13559,
      note = {Article downloaded and printed from the RePEc online  archive. This paper is Working Paper 8977 of the NBER  Working Paper Series (National Bureau of Economic  Research).},
      author = {Lerner, Josh,},
      url = {http://tind.wipo.int/record/13559},
      title = {Patent protection and innovation over 150 years /},
      recid = {13559},
      pages = {31 pages ;},
}