But as cage-free eggs get more popular, prepare to watch some of their advantage erode.
FORBES: The Riddle Of Cage-Free Eggs
Carey School of Business, asked 180 people in the Phoenix area if they would pay more for cage-free eggs.
Free-range eggs can cost as much as 75% more to produce than battery cage eggs.
BBC: NI farms cash in on 'free-range' market
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