Pedro Rey Biel is an economist working at the ESRC Centre for Economic Learning and Social Evolution (ELSE). He is currently completing his PhD at the Department of Economics at University College London (UCL) where he also teaches undergraduate courses in Microeconomics. His studies on a potential market for an AIDS vaccine started with his master thesis at Centro de Estudios Monetarios y Financieros (CEMFI, Madrid), where he graduated in 2000.