Retailing employs more than 30m Indians, so some fear social unrest if the admission of foreign chains puts small shops out of business. But given India’s rapid growth there is plenty of space for supermarkets to expand without killing small stores. Such worries are greatly outweighed by the potential benefits to Indian consumers: lower prices and better quality, choice and nutrition. Economists in America talk about the beneficial “Walmart effect” that the ubiquitous cheap chain has had on curbing prices. Indians, as they fret over soaring food costs, might find such a thing a godsend.