Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 2,046

The DOI matches its Crossref record.

Productivity and the Density of Economic Activity

Open access
Ciccone, Antonio, Hall, Robert·1993·National Bureau of Economic Research

Abstract

To explain the large differences in labor productivity across U.S. states, the authors estimate two models--one based on local geographical externalities and the other on the diversity of local intermediate services--where spatial density results in aggregate increasing returns. Both models lead to a relation between county employment density and productivity at the state level. Using data on gross state output, the authors find that a doubling of employment density increases average labor productivity by around 6 percent. More than half of the variance of output per worker across states can be explained by differences in the density of economic activity. Copyright 1996 by American Economic Association.

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.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.3386/w4313

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.

A few free checks a day · papers already verified open instantly · results are public

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

See all 2,046

Metadata

Authors
Ciccone, A., & Hall, R.
Venue
National Bureau of Economic Research
Published
1993-04
OpenAlex
W2161648066
Cited by
2,046
References
0
Type
report
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: Productivity and the Density of Economic Activity. https://app.cochat.ai/papers/10.3386/w4313
The paper
Ciccone, A., & Hall, R. (1993). Productivity and the Density of Economic Activity. National Bureau of Economic Research. https://doi.org/10.3386/w4313

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.