InterStudy Publications, a division of Decision Resources, Inc., announces the release of The Regional Market Analysis 13.2, which finds that large metropolitan markets (i.e., those with one million or more inhabitants) continued to have higher HMO penetration rates and more competition compared with medium and small markets between January 1, 2002 and January 1, 2003.

"Penetration rates across markets ranged from an average of 32% in large markets, to 23% in medium markets, and down to 15% in small markets," said Nicole Garberg, HMO project manager for InterStudy Publications. "Large markets were also the most competitive."

The Regional Market Analysis database provides HMO data at a Metropolitan Statistical Area (MSA) level, featuring information on market structure and competition. The database is used to help chart market evolution showing growth, market exits, and the impact of mergers on market structure. It includes an easy-to-use interface with data available in Excel or Access formats.

About InterStudy Publications

InterStudy Publications, a division of Decision Resources, offers data, directories, and analyses of the ever-evolving managed care industry. InterStudy tracks changes and trends in HMO and PPO services, enrollment, and profitability. Visit InterStudy Publications at

About Decision Resources

Decision Resources, Inc. is a world leader in research publications, advisory services, and consulting designed to help clients shape strategy, allocate resources, and master their chosen markets. The company has provided strategic information services for 30 years, and assesses international pharmaceutical and health care industry trends. Visit Decision Resources at

All company, brand, or product names contained in this document may be trademarks or registered trademarks of their respective holders.

  For more information, contact:    Frank Sama                         Elizabeth Marshall    InterStudy Publications            Decision Resources    781-296-2553                       781-296-2563      

SOURCE: InterStudy Publications

CONTACT: Frank Sama of InterStudy Publications, +1-781-296-2553,; or Elizabeth Marshall of Decision Resources,

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