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It is commonly believed that fear of malpractice underlies some of the potential overuse of resources in medicine, and prior studies support this belief (NEJM JW Gen Med Jun 17 2005). Texas, Georgia, and South Carolina changed their emergency care malpractice standards about 10 years ago, providing a natural experiment to demonstrate whether resource utilization varied before and after the risk of a malpractice lawsuit diminished substantially. In a review of Medicare beneficiary data from almost 4 million emergency department (ED) visits in these states before and after the legislative changes, researchers compared outcomes, including admission rate, per-visit ED charges, and use of high-cost imaging (computed tomography and magnetic reson…