The DOI matches its Crossref record.
Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations
Open accessAbstract
We compare the geographic location of patent citations with that of the cited patents, as evidence of the extent to which knowledge spillovers are geographically localized. We find that citations to domestic patents are more likely to be domestic, and more likely to come from the same state and SMSA as the cited patents, compared with a “control frequency” reflecting the pre-existing concentration of related research activity. These effects are particularly significant at the local (SMSA) level. Localization fades over time, but only very slowly. There is no evidence that more “basic” inventions diffuse more rapidly than others.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cited by
The reification of absorptive capacity: A critical review and rejuvenation of the construct
Lane, P. J., Koka, B. R., & Pathak, S. (2006) · Academy of Management Review · doi:10.5465/amr.2006.22527456 · Cited by 2,880
Tödtling, F., & Trippl, M. (2005) · Research Policy · doi:10.1016/j.respol.2005.01.018 · Cited by 2,571
Localization of Knowledge and the Mobility of Engineers in Regional Networks
Almeida, P., & Kogut, B. (1999) · Management Science · doi:10.1287/mnsc.45.7.905 · Cited by 2,565
Aging, Obsolescence, and Organizational Innovation
Sørensen, J. B., & Stuart, T. E. (2000) · Administrative Science Quarterly · doi:10.2307/2666980 · Cited by 1,862
Carbon Taxes, Path Dependency, and Directed Technical Change: Evidence from the Auto Industry
Aghion, P., Dechezleprêtre, A., Hémous, D., Martin, R., & Van Reenen, J. (2016) · Journal of Political Economy · doi:10.1086/684581 · Cited by 1,604
Metadata
- Authors
- Jaffe, A. B., Trajtenberg, M., & Henderson, R.
- Venue
- The Quarterly Journal of Economics
- Publisher
- Oxford University Press (OUP)
- Published
- 1993-08-01
- Volume
- 108
- Issue
- 3
- Pages
- 577-598
- ISSN
- 0033-5533 (ISSN-L)
- 1531-4650
- OpenAlex
- W2165429918
- Cited by
- 7,791
- References
- 0
- FWCI
- 61.00
- Type
- journal article
- Language
- en
- Open access
- green
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations. https://app.cochat.ai/papers/10.2307/2118401
- The paper
- Jaffe, A. B., Trajtenberg, M., & Henderson, R. (1993). Geographic Localization of Knowledge Spillovers as Evidenced by Patent Citations. The Quarterly Journal of Economics. https://doi.org/10.2307/2118401
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
