Evidence map›Paper›PMID 25904530›Full record

ArticleJournal of the Royal Society, Interface2015

Invention as a combinatorial process: evidence from US patents.

Hyejin Youn, Deborah Strumsky, Luis M A Bettencourt, José Lobo

Abstract read
In one paragraph

Article in Journal of the Royal Society, Interface, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 57 papers.

0numbers the graph read from it
0cells of the map it votes in
57citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

57 citing papers in PubMed.

  1. Article
  2. Semantic knowledge guides innovation and drives cultural evolution.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  3. Article
  4. The institutional dynamics of inequality for women inventors who break with conventional thinking.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  5. Scaling laws for function diversity and specialization across socioeconomic and biological complex systems.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  6. Article
  7. Origins of life: the possible and the actual.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Article
  8. Article
  9. An information-theoretic foreshadowing of mathematicians' sudden insights.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  10. Article
  11. Article
  12. Article
  13. Information consumption and firm size.Royal Society open science · 2024
    Article
  14. 3.3 million years of stone tool complexity suggests that cumulative culture began during the Middle Pleistocene.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  15. Idea engines: Unifying innovation & obsolescence from markets & genetic evolution to science.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  16. Article
  17. Group Coordination Catalyzes Individual and Cultural Intelligence.Open mind : discoveries in cognitive science · 2024
    Article
  18. Article
  19. Machine culture.Nature human behaviour · 2023
    Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Hyejin YounInstitute for New Economic Thinking at the Oxford Martin School, Oxford OX2 6ED, UK Mathematical Institute, University of Oxford, Oxford OX2 6GG, UK CABDyN Complexity Centre, University of Oxford, Oxford, UK Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, NM 87501, USA youn@maths.ox.ac.uk.
Deborah StrumskyThe William States Lee College of Engineering, University of North Carolina at Charlotte, Charlotte, NC 28223, USA.
Luis M A BettencourtSanta Fe Institute, 1399 Hyde Park Road, Santa Fe, NM 87501, USA.
José LoboSchool of Sustainability, Arizona State University, Tempe, AZ 85281, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Invention has been commonly conceptualized as a search over a space of combinatorial possibilities. Despite the existence of a rich literature, spanning a variety of disciplines, elaborating on the recombinant nature of invention, we lack a formal and quantitative characterization of the combinatorial process underpinning inventive activity. Here, we use US patent records dating from 1790 to 2010 to formally characterize invention as a combinatorial process. To do this, we treat patented inventions as carriers of technologies and avail ourselves of the elaborate system of technology codes used by the United States Patent and Trademark Office to classify the technologies responsible for an invention's novelty. We find that the combinatorial inventive process exhibits an invariant rate of 'exploitation' (refinements of existing combinations of technologies) and 'exploration' (the development of new technological combinations). This combinatorial dynamic contrasts sharply with the creation of new technological capabilities-the building blocks to be combined-that has significantly slowed down. We also find that, notwithstanding the very reduced rate at which new technologies are introduced, the generation of novel technological combinations engenders a practically infinite space of technological configurations.

Indexed as

Data Interpretation, StatisticalModels, StatisticalTerminology as TopicComputer SimulationPatents as TopicTechnologyTechnology Assessment, BiomedicalUnited Statescomplex systemtechnological changetechnological evolution

Identifiers

PMID25904530
PMCPMC4424706

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.