That is not to say that there would be no value to such data exchange. If Safeway were out of my favorite brand of breakfast cereal, I’d love for the clerk to tell me that Giant had plenty in stock just down the road, instead of selling me something similar. However, the amount of government funding required to overwhelm competitors’ resistance to doing this would surely not be worth it.The same goes for health information exchange: $26 billion has not done the trick. It is unlikely that the remaining $4 billion in the pot will get the job done. The Office of the National Coordinator of Health IT has been promoting a ten-year plan for more funding — even a trust fund like the Federal Highway Trust Fund!Congress should be very skeptical of appropriating yet more funding to hunt this unicorn.