The Impact of Information Technology on Emergency Health Care Outcomes
分析增强型911（E911）信息技术对紧急响应系统生产力的影响，利用1994-1996年宾夕法尼亚州救护车和医院记录，发现E911改善了患者到达时的健康状况，并降低了死亡率和住院费用。
We analyze the productivity of information technology in emergency response systems. "Enhanced 911" (E911) is information technology that links caller identification to a location database and so speeds up emergency response. We assess the impact of E911 on health outcomes using Pennsylvania ambulance and hospital records between 1994 and 1996, a period of substantial adoption. We find that as a result of E911 adoption, patient health measured at the time of ambulance arrival improves, suggesting that E911 speeds up emergency response. Further analysis using hospital discharge data shows that E911 reduces mortality and hospital costs.