Changes in technical efficiency after quality management certification: A DEA approach using difference-in-difference estimation with genetic matching in the hospital industry ?
We analyze changes in hospital efficiency after quality management certification. The study is based on German acute care hospitals over a 10-year period. We employ a novel approach to control for self-selection bias for certification. The international ISO 9001 certification has a negative impact on efficiency. The hospital-specific KTQ certification has a positive impact on efficiency.
quality management certification iso 9001 or in health services data envelopment analysis