Despite improvements in production incentives, agricultural output in Africa remained sluggish through the 1990s. Low use of purchased inputs may be part of the cause of persistently low productivity in African agriculture. This article analyzes the roles of relative prices and transactions...

Entrepreneurs making decisions under uncertainty are encouraged to evaluate their initial ideas through hypothesis testing, but entrepreneurial approaches vary in their emphasis on ex-ante theory development prior to collecting evidence. In this paper, we examine whether and how entrepreneurs...