Information Systems / Data Envelopment Analysis / Benchmarking / Hospitals / Humans / Hospital administration / United States / Pneumonia / Medical systems / Technical efficiency / Medicare / Efficiency / Anti-Bacterial Agents / Virginia / Public health systems and services research / Management Audit / Cross Sectional Studies / Acute Care / Performance Measure / Quality Measures / Hospital administration / United States / Pneumonia / Medical systems / Technical efficiency / Medicare / Efficiency / Anti-Bacterial Agents / Virginia / Public health systems and services research / Management Audit / Cross Sectional Studies / Acute Care / Performance Measure / Quality Measures