Publications in the Economic category Click on any of the publications below to find out more about them, or to purchase PDF copies. Financial Blues: The Institutional Adaptation of the Yoruba Credit System, 1851–1900 IJAHS 51, by Olatunji Ojo, pp. 17—36 p. (2018) The Economic Position of Beti Widows, Past and Present, WP 22, by Jane I. Guyer, (1979)