A better mattress

摘要

It is hard for people in the rich world to imagine what it is like to live on $2 a day. But for those who do, the problem is often not just a low income, but an unpredictable one. Living on $2 a day frequently means living for ten days on $20 earned on a single day. The task of smoothing consumption is made more complicated if there is nowhere to store money safely. In an emergency, richer people might choose between dipping into their savings and borrowing. The choice for the great mass of the unbanked in the developing world is limited to whom to borrow from, often at great cost.