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'''An orginal sample of papers was retrieved from journal databases using keyword searches.''' Journal databases searched included Google Scholar, Proquest, EBSCO, World of Science, JSTOR, and others. Google Scholar provided by far the most papers and now appears to dominate as a journal search tool. Keywords searched included "patent thicket", "anticommons", "Herfindahl", "blocking patents", "infringing", "dense web", "patent network", and others, both individually and in combination with one another. In additional, several papers that cite certain key papers, including Shapiro (2001), Ziedonis (2004), Hall et al. (2012), were also searched.
Patent Thicket Literature Review (view source)
Revision as of 21:23, 6 March 2013
, 21:23, 6 March 2013no edit summary
The review process consists of the following steps:
#An [[#Original Sample| original sample]] of papers was retrieved from journal databases#These papers were very quickly classified into [[#Core, Up, and Down Groups| core, up, and down groups]]. This classification is undoubtedly subject to errors.#The Core group of papers were used to undertake a [[#Convergence Process| convergence process]]
#Additional core papers, indentified in the Convergence Process were added to the sample
#All papers were manually classified into groups and [[#BibTeX Entry Tagging| bibtex entry tagging]] was performed
We are currently conducting step 5 of this process.
==Original Sample==
This process yielded 251 papers that spanned economics, management, public policy, law, computer science, the physical sciences, and policy reports by government or NGOs. 2 papers were added to this list following a recommendation from Peter.
There were origininally 59 papers classified as core in step 2 of the process. Once stage 5 of the process is completed, each core paper will be reviewed in detail and get its own page on this site.
===The Down Group===
The down group consists of papers that underpin the thicket literature while not explicitly discussing thickets. This group includes theory models for complementary or substitute innovations, for sequential innovation, for 'probabilistic patents', or for patent races, discussions of the relative importance of various aspects of intellectual property (such confering rents vs. providing information), and econometric papers on the use of patent statistics.
At a first take it appears that this groups consists of papers concerning:
*'''Mechansisms for addressing the consequences of thickets''': SSOs and Standardization, Licensing arrangements, Trolls, Clearance Houses, Joint Ventures, and so forth.
*'''IPR reform''': advocating changes to patent policy, antitrust policy, the Bayh-Dole Act, etc.
*'''Firm strategy''': strategic responses to thickets, the effects of thickets on portfolio values, and other advocation of firm-level responses
