As a PhD Student, I conduct research on routine health data which provides information for a learning health system. My focus is on care paths for specific diagnostic groups such as patients with osteoarthritis in the knee and hip. I look at effects of health policy measurements on these care paths and whether shifts occur in the care provided over time. This project is a joined initiative from the Netherland Institute for Health Services Research (Nivel) and the National Health Care Institute (Zorginstituut Nederland).