As well as visiting village stores outside Hyderabad, they drew on household surveys in 13 developing countries, from Mexico and Panama to Tanzania, South Africa and East Timor.

• 他们在对13个发展中国家就家庭情况进行了一些调查。他们沿墨西哥、巴拿马至坦桑尼亚，从南非到东帝汶，走访海德拉巴附近乡村的一些商店是调查的一部分。