Economic analyses from the egg industry itself show that it would cost only about a penny or two more per egg to go cagefree, something the largest retailers are already doing. In fact, McDonald's is going 100 percent cage-free and says it won't raise its prices even a penny. Costco, Walmart, Safeway, and more than 250 other major retailers have made similar cage-free pledges, with different dates of implementation. The ballot measure will help assure consumers that the food retailers will abide by the promised standards.