An insurance agent in Miami helps a consumer sign up for coverage through the Affordable Care Act exchange in this February 2015 photo. Health insurance companies underestimated the cost of covering the newly insured on the ACA exchange, leading to higher premiums and less choice for many consumers, according to a study released Thursday.
An insurance agent in Miami helps a consumer sign up for coverage through the Affordable Care Act exchange in this February 2015 photo. Health insurance companies underestimated the cost of covering the newly insured on the ACA exchange, leading to higher premiums and less choice for many consumers, according to a study released Thursday. PATRICK FARRELL MIAMI HERALD STAFF
An insurance agent in Miami helps a consumer sign up for coverage through the Affordable Care Act exchange in this February 2015 photo. Health insurance companies underestimated the cost of covering the newly insured on the ACA exchange, leading to higher premiums and less choice for many consumers, according to a study released Thursday. PATRICK FARRELL MIAMI HERALD STAFF

What worked and what didn’t in Obamacare exchange? Study might offer lessons for Congress

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