The DOI matches its Crossref record; 8 of the 8 references it cites were found in a registry or an index.
Some Interim Results from a Controlled Trial of Cost Sharing in Health Insurance
Abstract
A total of 7706 persons are participating in a controlled trial of alternative health-insurance policies. Interim results indicate that persons fully covered for medical services spend about 50 per cent more than do similar persons with income-related catastrophe insurance. Full coverage leads to more people using services and to more services per user. Both ambulatory services and hospital admissions increase. Once patients are admitted to the hospital, however, expenditures per admission do not differ significantly among the experimental insurance plans. In addition, hospital admissions for children do not vary by plan. The income-related cost sharing in the experimental plans affects expenditure by different income groups similarly, but adults' total expenditure varies more than children's. Sufficient data are not available on whether higher use by persons with free care reflects overuse, or whether lower use by those with income-related catastrophe coverage reflects underuse. Both may well be true.
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
Cites
Enthoven, A. C. (1978) · New England Journal of Medicine · doi:10.1056/nejm197803232981204 · Cited by 346
The Changing Geographic Distribution of Board-Certified Physicians
Schwartz, W. B., Newhouse, J. P., Bennett, B. W., & Williams, A. P. (1980) · New England Journal of Medicine · doi:10.1056/nejm198010303031803 · Cited by 183
Self-citationUtilization review in the United States: results from a 1976-1977 national survey of hospitals.
Gertman, P. M., Monheit, A. C., Anderson, J. J., Eagle, J., & Levenson, D. (1979) · PubMed · Cited by 156
The Distribution of Medical Services before and after “Free” Medical Care — The Quebec Experience
Enterline, P. E., Salter, V., Ad, M., & Jc, M. (1973) · New England Journal of Medicine · doi:10.1056/nejm197311292892206 · Cited by 129
Conceptualization and Measurement of Health for Children in the Health Insurance Study
Eisen, M. B., Donald, C. A., Ware, J. E., & Brook, R. H. (1980) · Cited by 114
Self-citationQuality Change and the Demand for Hospital Care
Feldstein, M. S. (1977) · Econometrica · doi:10.2307/1913959 · Cited by 102
A finite selection model for experimental design of the health insurance study
Morris, C. N. (1979) · Journal of Econometrics · doi:10.1016/0304-4076(79)90053-8 · Cited by 96
Self-citationPolicy Options and the Impact of National Health Insurance
Newhouse, J. P., Phelps, C. E., & Schwartz, W. B. (1974) · New England Journal of Medicine · doi:10.1056/nejm197406132902404 · Cited by 82
Self-citation
Cited by
The demand for deductibles in private health insurance
Van de Ven, W. P. M. M., & Van Praag, B. M. S. (1981) · Journal of Econometrics · doi:10.1016/0304-4076(81)90028-2 · Cited by 1,367
A Comparison of Alternative Models for the Demand for Medical Care
Duan, N., Manning, W. G., Morris, C. N., & Newhouse, J. P. (1983) · Journal of Business & Economic Statistics · doi:10.1080/07350015.1983.10509330 · Cited by 1,292
Self-citationDoes Free Care Improve Adults' Health?: Results from a Randomized Controlled Trial
Brook, R. H., Ware, J. E., Rogers, W. H., Keeler, E. B., Davies, A. R., Donald, C. A., Goldberg, G. A., Lohr, K. N., Masthay, P. C., & Newhouse, J. P. (1983) · New England Journal of Medicine · doi:10.1056/nejm198312083092305 · Cited by 666
Self-citationA Controlled Trial of the Effect of a Prepaid Group Practice on Use of Services
Manning, W. G., Leibowitz, A., Goldberg, G. A., Rogers, W. H., & Newhouse, J. P. (1984) · New England Journal of Medicine · doi:10.1056/nejm198406073102305 · Cited by 572
Self-citationA Microeconometric Model of the Demand for Health Care and Health Insurance in Australia
Cameron, A. C., Trivedi, P. K., Milne, F., & Piggott, J. (1988) · The Review of Economic Studies · doi:10.2307/2297531 · Cited by 481
Metadata
- Authors
- Newhouse, J. P., Manning, W. G., Morris, C. N., Orr, L. L., Duan, N., Keeler, E. B., Leibowitz, A., Marquis, K. H., Marquis, M. S., Phelps, C. E., & Brook, R. H.
- Venue
- New England Journal of Medicine
- Publisher
- Massachusetts Medical Society
- Published
- 1981-12-17
- Volume
- 305
- Issue
- 25
- Pages
- 1501-1507
- ISSN
- 0028-4793 (ISSN-L)
- 1533-4406
- OpenAlex
- W1996731000
- Cited by
- 559
- References
- 8
- FWCI
- 120.34
- Type
- journal article
- Language
- en
- Open access
- closed
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: Some Interim Results from a Controlled Trial of Cost Sharing in Health Insurance. https://app.cochat.ai/papers/10.1056/nejm198112173052504
- The paper
- Newhouse, J. P., Manning, W. G., Morris, C. N., Orr, L. L., Duan, N., Keeler, E. B., Leibowitz, A., Marquis, K. H., Marquis, M. S., Phelps, C. E., & Brook, R. H. (1981). Some Interim Results from a Controlled Trial of Cost Sharing in Health Insurance. New England Journal of Medicine. https://doi.org/10.1056/nejm198112173052504
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.
