Seth Godin posts a very insightful blog entry on the HBR site. He's talking about the challenges of marketing at the bottom of the pyramid:
When someone in poverty buys a device that improves productivity, the
device pays for itself (if it didn't, they wouldn't buy it.) So a drip
irrigation system, for example, may pay off by creating two or three
harvests a year instead of one.
Read all about it >>