Abstract
Many people do not purchase products that would appear to benefit them. For example, the price of an efficient cookstove can be less than a few months’ savings on fuel. If liquidity constraints, present bias, and poor information on fuel savings and stove durability are barriers, then combining a free trial, time payments, and the right to return the stove at any time should increase sales. In a randomized trial, this offer increases uptake of an efficient charcoal-burning stove in Kampala, Uganda, from 4% to 46%. We provide additional evidence that both liquidity constraints and imperfect information were important barriers.