RT Journal Article SR Electronic T1 Information Integration, Coordination Failures, and Quality of Prescribing JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 0921-11910R2 DO 10.3368/jhr.0921-11910R2 A1 Böckerman, Petri A1 Laine, Liisa T. A1 Nurminen, Mikko A1 Saxell, Tanja YR 2022 UL http://jhr.uwpress.org/content/early/2022/12/01/jhr.0921-11910R2.abstract AB Poor information flows hamper coordination, potentially leading to suboptimal decisions in health care. We examine the effects of a large-scale policy of health information integration. We use the staggered adoption of a nationwide electronic prescribing system over four years in Finland and prescription-level administrative data. Our results show no discernible effect on the probability of co-prescribing harmful drugs on average, but the heterogeneity analysis reveals that this probability reduces in rural regions, by 35 percent. This substantial reduction is driven by interacting prescriptions from different physicians and generalists. Information integration can therefore improve the coordination of physicians’ interdependent decisions.