Often, they are on performance-related pay schemes, schooling their staff in what colours and styles of clothing are in fashion and how to sift out treasures that might sell well at auction.

ECONOMIST: Charity shops

Researchers note the money is often used to pay for children's schooling and make other investments that improve quality of life.

NPR: Filipino Families Divided by Distance, Economics

Ms Tenemeri raises cows and goats in Loliondo to pay for food and her children's schooling.

BBC: Tanzania's Maasai battle game hunters for grazing land

Colonel Denton with the Indiana Guard is among those who were studying that -pay and bonuses, better health benefits, professional schooling, more time at home.

NPR: Veteran Soldiers, Guardsmen Cut Careers Short

Among Hispanic and white men, the pay gap narrows to 8% after adjusting for years of schooling and disappears altogether with the addition of AFQT scores.

FORBES: Regulations Are Very Expensive, But Their Economic Value Is Negative

Imagine that the graduate school in question is constitutionally forbidden from receiving any form of government aid, that it typically requires three years of full-time schooling for the diploma, that the nature of the schooling bears almost no resemblance to the job in question, and that the pay for graduates is far lower than other professions.

FORBES: The Seminary Bubble

These farmers pay workers a salary way above the minimum wage, and even provide their children with free schooling, our reporter adds.

BBC: South Africa police fire rubber bullets at farm workers