@article{
 title = {Patterns of technology life cycles: stochastic analysis based on patent citations},
 type = {article},
 year = {2017},
 identifiers = {[object Object]},
 keywords = {Patterns of technology life cycles,cluster analysis,hidden Markov model,patent citations},
 pages = {53-67},
 volume = {29},
 websites = {https://www.tandfonline.com/doi/full/10.1080/09537325.2016.1194974},
 month = {1},
 day = {2},
 id = {a5e0ca25-219c-3192-b9d3-e7331351ead5},
 created = {2018-06-28T12:14:07.140Z},
 accessed = {2018-06-28},
 file_attached = {false},
 profile_id = {35f49df4-e9cf-391e-a76a-8e9e316c42aa},
 group_id = {ee11d323-dd56-3515-8742-9b1e2f0496f7},
 last_modified = {2018-07-03T13:00:02.411Z},
 read = {false},
 starred = {true},
 authored = {false},
 confirmed = {false},
 hidden = {false},
 folder_uuids = {9b2282dc-17fd-49c7-b424-5a5984ff81f7,0f486643-3d08-4632-8e8e-e53433d903a9},
 private_publication = {false},
 abstract = {Patent analysis has been considered as an effective means of estimating phases of a technology life cycle. However, previous studies have not considered the dynamic and idiosyncratic aspects of a technology’s progression since they were based on deterministic methods, mainly fitting s- or double s-shaped curves to patent application counts. Moreover, previous methods cannot be executed at the individual patent level. We propose a stochastic technology life cycle analysis to trace the phases of a technology’s progression based on patent citations and identify the patterns of technology life cycles at the individual patent level. At the heart of the proposed approach are a hidden Markov model to estimate the probability of a system being at a certain hidden state from observation and cluster analysis to group a set of objects according to their similarities. A case study of patents about laser technology in lithography is presented.},
 bibtype = {article},
 author = {Lee, Changyong and Kim, Juram and Noh, Meansun and Woo, Han-Gyun and Gang, Kwangwook},
 journal = {Technology Analysis & Strategic Management},
 number = {1}
}

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