The potential of mobile phones to revolutionize access to financial services in developing countries is exemplified powerfully by the success of the M-Pesa mobile money service in Kenya. But the apparent difficulty of replicating M-Pesa's success even in neighboring countries suggests that some...

It is illegal to uproot coffee. But nowadays in the farmsteads of Murang'a district, at the heart of the coffee producing belt of Central Kenya, one can see many crops other than coffee growing between the coffee bushes, while coffee itself remains untended. In particular, the dark green with...