The bottom of the pyramid.

The article considers companies in the U.S. and other developed countries which offer products and services for poorer consumers. It is noted that the real income of U.S. consumers has declined since 2005, and that 44 million persons have an income below the government definition of poverty, making this group a significant market. The fast food restaurant chain company McDonald's, whose sales have increased annually since 2006, is cited as an example.