Concept Architecture
Concept
Theoretically, Price Elasticity of Healthcare measures the responsiveness of healthcare utilisation to changes in the price paid by consumers, holding other determinants of demand constant. It is an application of consumer demand theory to healthcare markets and reflects how out-of-pocket costs, user charges or insurance cost-sharing influence the consumption of healthcare services. The concept exists to quantify the behavioural response of patients to price changes and to support efficient pricing, insurance design and health policy.
Mathematically, price elasticity of healthcare is represented as the ratio of the percentage change in healthcare utilisation to the percentage change in the price of healthcare. The elasticity coefficient provides a unit-free measure of responsiveness and may be estimated using point elasticity, arc elasticity or econometric demand models. The estimated elasticity indicates whether demand for a healthcare service is relatively elastic or inelastic.
In practice, price elasticity of healthcare is estimated using observational data, insurance claims, household surveys, natural experiments and randomised studies such as the RAND Health Insurance Experiment. Health economists estimate elasticities for physician visits, hospital services, pharmaceuticals, preventive care and diagnostic testing using regression techniques that account for insurance coverage, income, health status and other confounding factors. Estimated elasticities inform cost-sharing policies, reimbursement strategies, pricing decisions and demand forecasting.
Purpose
Used to measure how healthcare utilisation responds to changes in patient prices, evaluate insurance benefit design, estimate the effects of copayments and deductibles, forecast service utilisation, and inform pricing and reimbursement policy.
Mathematical Formulae
Primary Formula
E_d = %?Q_h / %?P_h
where:
- E_d = price elasticity of healthcare demand
- %?Q_h = percentage change in healthcare utilisation
- %?P_h = percentage change in the price paid for healthcare
Supporting Formulae
Point elasticity:
E_d = (dQ / dP) ? (P / Q)
Arc elasticity:
E_d = [(Q? ? Q?) / ((Q? + Q?) / 2)] � [(P? ? P?) / ((P? + P?) / 2)]
Related Mathematical Methods
- Demand function estimation
- Log-linear regression
- Constant elasticity demand models
- Arc elasticity estimation
- Point elasticity estimation
- Instrumental variable estimation
Example
A health system increases the patient copayment for specialist consultations from �20 to �25. Annual consultations decrease from 12,000 to 11,400.
Percentage change in utilisation:
((11,400 ? 12,000) / 12,000) ? 100 = ?5%
Percentage change in price:
((25 ? 20) / 20) ? 100 = 25%
Price elasticity of healthcare:
E_d = ?5% / 25% = ?0.20
The absolute elasticity is 0.20, indicating highly inelastic demand. Utilisation falls only modestly despite a substantial increase in patient charges.
Excel Implementation
| Function | Example Formula | Health Economics Application |
|---|---|---|
| Percentage change | =(B2-A2)/A2 | Calculate percentage change in copayment or utilisation |
| Elasticity | =((D2-C2)/C2)/((B2-A2)/A2) | Estimate price elasticity of healthcare demand |
| ABS | =ABS(E2) | Report elasticity as an absolute value |
| LN | =LN(C2/C1)/LN(A2/A1) | Estimate constant elasticity using logarithmic changes |
| LINEST | =LINEST(LN(Q2:Q100),LN(P2:P100),TRUE,TRUE) | Estimate elasticity from healthcare utilisation data |
VBA (Optional)
Automate estimation of healthcare demand elasticities across multiple services or patient groups and generate summary reports for pricing and policy analysis.
Sources
- Drummond MF, Sculpher MJ, Claxton K, Stoddart GL, Torrance GW. Methods for the Economic Evaluation of Health Care Programmes. Oxford University Press.
- Manning WG, Newhouse JP, Duan N, Keeler EB, Leibowitz A, Marquis MS. Health Insurance and the Demand for Medical Care: Evidence from a Randomized Experiment. American Economic Review. 1987.
- Newhouse JP. Free for All? Lessons from the RAND Health Insurance Experiment. Harvard University Press.
- Phelps CE. Health Economics. Routledge.
- NICE. Health Technology Evaluation Manual.
Related Concepts (2)
Library
Publications
1
The Economics of Health and Health Care — Folland, Goodman, Stano & Danagoulian, 9th Edition ed., 2024 (Routledge)
The market-leading general health economics textbook, giving comprehensive coverage of health economics through core economic themes and balancing theory, empirical evidence and public policy. The ninth edition adds chapters on health disparities and pandemic economics.
BookView source →
Frequently Asked Questions (6)
What is the price elasticity of health care?
An empirical estimate of how sensitive healthcare use is to changes in out-of-pocket price, most famously quantified by a large randomised experiment.
Source: Newhouse et al. 1993
Which experiment produced the main estimates of the price elasticity of health care?
The most influential estimates came from the RAND Health Insurance Experiment, a large study in the United States that randomly assigned families to insurance plans with different levels of cost-sharing and observed how their use of care differed. Because assignment was random, the differences in use could be attributed to price rather than to who chose which plan, which earlier observational studies could not do. This design made its estimates unusually credible. Manning and colleagues (1987) reported the main results.
Source: Manning et al. 1987
What did the evidence show about the price elasticity of health care?
The evidence, chiefly from the RAND Health Insurance Experiment, showed that the demand for health care is relatively insensitive to price but not unresponsive: as the share of costs borne by patients rose, their use of care fell to a modest degree. Higher cost-sharing reduced the quantity of services used across most types of care. The finding established that patients do respond to the price they face, though weakly, contrary to any assumption that medical demand ignores price entirely.
Source: Newhouse et al. 1993
Why is health care demand relatively price-inelastic?
Health care demand is relatively price-inelastic because much care is a necessity with few substitutes, particularly when illness is serious, so patients continue to seek it despite higher prices. Insurance shields patients from much of the cost at the point of use, weakening their response further, and limited information leaves patients reliant on providers to decide what care is needed. These features mean use responds only modestly to the out-of-pocket price, giving a low elasticity.
Source: Newhouse et al. 1993
Did cost-sharing affect health as well as use?
The RAND experiment found that greater cost-sharing reduced the use of care with little measurable harm to the health of the average participant, since it discouraged both needed and unnecessary care roughly alike. For poorer and sicker participants, however, reduced use was associated with some worse outcomes. The result suggested that cost-sharing can lower spending without harming most people's health, while cautioning that vulnerable groups may be adversely affected, which bears on how cost-sharing is designed.
Source: Newhouse et al. 1993
Why does the price elasticity of health care matter for policy?
The price elasticity of health care matters for policy because it predicts how cost-sharing will affect the use of care and hence spending. A low but non-zero elasticity implies that co-payments and deductibles reduce use modestly, offering some control over spending, but that they may deter needed as well as unnecessary care and bear hardest on the poor and sick. The evidence therefore guides the design of cost-sharing, balancing restraint on use against protection and access.
Source: Newhouse et al. 1993
Trust Record
Verified by Dr Darrin Baines
British health economist
Professional identity: darrinbaines.org
Verification date: 11 Sep 2025
Content version: 1.0.0
Canonical Identity
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