This paper develops and tests a dynamic model of hospital focus. It does so by tracing the performance trajectories of specialist and general hospitals to identify whether a performance gap exists and whether it widens or shrinks over time. Our longitudinal analyses of all hospital organizations within the English National Health Service (NHS) reveal not only a notable performance gap between specialist and general hospitals in particular with regards to patient satisfaction that widens over time, but also the emergence of a gap especially with regards to hospital staff job satisfaction. These findings reflect the considerable potential of specialization as a means to enhance hospital effectiveness. However, they also alert health policy makers to the threat of a widening performance gap between specialist and general hospitals with potential negative repercussions at the patient and health system level.
Keywords: Focus; Hospitals; Mixed-effect growth models; Performance; Specialization.