The Parsis closed their maternity hospital in Mumbai a decade ago because of a lack of births.

ECONOMIST: The travails of a small but amazingly successful community

The children of women who marry outside do not count as Parsis, despite an otherwise progressive attitude to women.

ECONOMIST: The travails of a small but amazingly successful community

Perhaps 61, 000 Parsis are left in India today, three-quarters of them in Mumbai.

ECONOMIST: The travails of a small but amazingly successful community

Later, she wrote a book on the Parsis, a Zoroastrian community in India.

NEWYORKER: Seeing and Believing

Jehangir Patel, editor of Parsiana, a magazine for the Parsi community, says Parsis often marry late, like the lovebirds in the film, or not at all.

ECONOMIST: The travails of a small but amazingly successful community

The caste origins of India's billionaires are on predictable lines: 28 of the 46 billionaires come from traditional merchant classes ( Banias, Parsis and Sindhis, for example), and a number of them belong to upper caste communities like Brahmins and Khatris.

BBC: India's billionaires and the wealth of the nation