Related Experiment Video
Updated: Aug 6, 2026

Inverse Probability of Treatment Weighting (Propensity Score) using the Military Health System Data Repository and National Death Index
Published on: January 8, 2020
The determinants of HMO enrollment and growth
Abstract:
This paper analyzes why HMO enrollment and growth have varied greatly among states. Using Tobit analysis, a number of variables are related to state HMO market share in 1976 and the change in HMO market share from 1966 to 1976. Higher hospital costs and mobile populations are shown to have encouraged HMO development. There is some evidence that the extent of unionization and the presence of group practices encourages HMO enrollment and growth. Legal restrictions on HMO development imposed at the state level appear to have had little effect upon HMOs. In particular, certificate-of-need laws have not impeded HMO enrollment and growth. Consequently, our results suggest that the enrollment and growth of HMOs respond more to impersonal market and demographic conditions than to certain legal restrictions.
Related Concept Videos
Population Growth
Issues And Trends In Healthcare Delivery System
Cost Containment
Payment for healthcare services has historically promoted adoption of costly and often unnecessary or inefficient...
Models of Health Promotion and Illness Prevention I
The health belief model (HBM) attempts to predict health-related behavior in specific belief patterns. According to the HBM, a person's...
Documentation in Long-Term and Home Healthcare Setting
Long-Term Care Facilities
Health Information Technology and Healthcare Information System
Health Information Technology, commonly called HIT, integrates advanced information systems and technology in healthcare settings. Its primary functions include:
Exponential Equations for Modeling Growth