Professor Baker has written extensively on theories of practice-based learning, critical perspectives on legal writing and cross-cultural lawyering. He has taught and consulted extensively in South African law schools and law school clinics since 1997, particularly on issues of multiculturalism, human rights and HIV/AIDS. Professor Baker assisted in developing the first legal skills course book for South African law schools and is coauthor of a related teachers' manual.

Professor Baker is a core member and policy advisor for Health GAP (Global Access Project), an activist organization seeking worldwide access to HIV/AIDS treatment. In addition to focusing on trade and intellectual property issues affecting affordability of medicines, Professor Baker lobbies for full funding of multilateral and bilateral initiatives, debt relief and elimination of public sector spending caps and user fees. Recently, he has consulted with the Association of Southeast Asian Nations, the UN Millennium Development Goals Project and the UK Department for International Development. He writes law review articles and activist position papers in multiple forums on access to treatment issues.