The first instance of voucher-based OBA was in South Korea and Taiwan in the 1960s. According to Malcolm Potts, these family-planning initiatives were very successful. There were few such instances where OBA was used for development purposes up until the new millennium. Voucher-based healthcare schemes were piloted in Latin America, Asia and Africa in the 1990s and early 2000s.KFW Entwicklungsbank, "Interview with Prof. Dr. Malcolm Potts with respect to Output-Based-Aid (OBA) voucher schemes as a means of promoting public health in developing countries." Available from < http://www.kfw-entwicklungsbank.de/EN_Home/Topics/Health/Interview_mit_Prof_Potts_Berkeley.pdf>
