Christopher Cramer and John Sender, authors of the book, African Economic Development: Evidence, Theory, and Policy, discuss their book (co-written with Arkebe Oqubay) and how economic policy needs to be rooted in flexibly responding to changing circumstances and consequences, instead of dogma. 

Link to a PDF version of the book:  http://fdslive.oup.com/www.oup.com/academic/pdf/openaccess/9780198832331.pdf