Read about the"Differing Impacts of Market Concentration on Affordable Care Act Marketplace Premiums" found at this link: https://www.commonwealthfund.org/publications/journal-article/2016/may/differing-impacts-market-concentration-affordable-care-act 

In the article, there are two geographic locations and three interactive markets described.

Discuss whether the findings of the impact of market concentration make sense. While answering consider the geographic markets, product markets, buyers in the market, and how the markets interact with each other.

How would you measure market share in each of the markets discussed?