Fourteen-year-old Jillian Bernstein got herself published in the Journal of the American Medical Association by comparing the transparency of medical costs at Philadelphia hospitals with the transparency of parking rates at the same hospitals. Out of 20 hospitals, 19 were happy to provide information on the cost to park a car. Only three, however, were willing to tell her how much it would cost an uninsured person to get an electrocardiogram, and those prices were ridiculously variable — $137, $600 and $1,200, depending on the hospital.