Changes

filename={Hall Ziedonis (2007) - An Empirical Analysis Of Patent Litigation In The Semiconductor Industry.pdf}

}

@article{harhoff2007strategic,

title={The strategic use of patents and its implications for enterprise and competition policies},

filename={Harhoff Hall vonGraevenitz Hoisl Wagner Gambardella Giuri (2007) - The Strategic Use Of Patents And Its Implications For Enterprise And Competition Policies.pdf}

}

@article{heller1997tragedy,

title={Tragedy of the Anticommons: Property in the Transition from Marx to Markets, The},

filename={Merges (1999) - Institutions For Intellectual Property Transactions.pdf}

}

@article{murray2007formal,

title={Do formal intellectual property rights hinder the free flow of scientific knowledge?: An empirical test of the anti-commons hypothesis},