- India’s Common People: Who Are They, How Many Are They and How Do They Live?  Arjun Sengupta , K P Kannan , G Raveendran. "This paper attempts to define the common people of India in terms of levels of consumption and examines their socio-economic profile in different periods of time since the early 1990s with a view to assessing how the economic growth process has impacted on their lives."

-  The 2005 Global Report on Purchasing Power Parity Estimates: A Preliminary Review.  Alan Heston. The fifth (2005) round of the World Bank’s International Comparison Program, which produces estimates of the gross domestic product at purchasing power parity prices, has been the most extensive and carefully monitored project so far. The preliminary estimates were noticeable for the large downward revisions of gdp estimates of China and India. This article suggests that there were five reasons for the revisions in the fifth round. The single most important factor was the adjustment to productivity estimates of government services; a correction was required but the icp perhaps produced too large an adjustment for China and India.

- Revising Estimates of Poverty, S Mahendra Dev , C Ravi.  One of the criticisms of the official poverty line is that it does not capture the cost of basic necessities, particularly non-food components such as health and education. This issue gains importance due to an increase in household private expenditure on education and health services in recent years. This article estimates poverty ratios at the all India level and for the states in 2004-05 by including the minimum private expenditure on health and education. The estimated poverty ratios are substantially higher than the official poverty ratios.

but you have to search for these, as I can't seem to link directly to the articles.