Smith is fighting for his maiden professional title in only his eleventh fight in professional ranks, while reigning champion Simpson has mixed in championship class for six years and previously held the British featherweight title.

BBC: Smith wants Simpson's Commonwealth Featherweight title

But he is a typical product of Peru's provincial middle class: he is mestizo (of mixed race), speaks no Indian language and went to a private school.

ECONOMIST: Peru

The class-action lawyers' own discovery, mixed with forthcoming findings from state and national regulators, should put major investments banks back at the bargaining table.

FORBES: Magazine Article

Scott Keller, deputy chief of staff for the Department of Housing and Urban Development, says the goal of mixed-income housing is to minimize differences between the city's poor and middle-class.

NPR: New Orleans' Controversial Public Housing Model

Those brought up in a middle-class family could manage 9.4, and those whose economic and social experiences had been mixed were in the middle.

ECONOMIST: Neuroscience and social deprivation

Diversity has always been a mixed blessing of the reality genre, which is one of the few places that network television invites working-class people to appear as themselves.

NEWYORKER: My Strange Addiction