Why don’t physicians guarantee their work as do many auto repair shops? Various commentators have suggested that only 15 to 20 percent of all health care services have been subject to rigorous,...

Why don’t physicians guarantee their work as do many

auto repair shops?

Various commentators have suggested that only 15 to

20 percent of all health care services have been subject to

rigorous, controlled investigation, that is, care based on

what is commonly called “evidence-based medicine.”

Assume that this statement is correct. What are some implications for efficiency of health care delivery?