Policy ForumIntellectual Property and Innovation

The growing problem of patent trolling

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Science  29 Apr 2016:
Vol. 352, Issue 6285, pp. 521-522
DOI: 10.1126/science.aad2686
  • NPEs target cash-rich firms

    “Cash-rich” describes a firm with 1 SD more cash than the average firm in the sample. The difference for NPEs is highly statistically significant (P < 0.001). The difference for PEs is in the opposite direction and statistically insignificant. See SM for data and methods.

    GRAPHIC: C. SMITH/SCIENCE
  • Recent trends in patent litigation

    NPE, PE, and total patent litigation against publicly traded firms, 2005–2015. Data derived from public f lings [Public Access to Court Records (PACER)]. See SM for data and methods.

    GRAPHIC: C. SMITH/SCIENCE
  • The growing problem of patent trolling

    Lauren Cohen, Umit G. Gurun, Scott Duke Kominers

    Materials/Methods, Supplementary Text, Tables, Figures, and/or References

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    • Materials and Methods
    • Captions for Figs. S1 to S5
    • Legends for Tables S1 to S5
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    Data file S1

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