The major supermarket chains have a substantial economic and social impact on consumers, businesses and communities and are crucial to Australia's economic growth and productivity. Given their size and reach, regulation of the chains poses significant challenges. This interdisciplinary, empirical and theoretically driven project will interrogate the goals and processes of competition law as it applies in the retail grocery sector. In the first Australian research of its kind, it will explain how the chains' strategies and industry relationships influence regulatory action. The research will produce recommendations on instruments and techniques to ensure that regulation of the sector is legally and practically efficient and effective.