New Delhi, Aug. 26 -- With the economy in the grip of a slowdown and questions over India's GDP calculations, a new study suggests that another component of GDP measurement may also be distorted. According to an Economic and Political Weekly study by Jayanta Kumar Mallik of the Reserve Bank of India, the current method of measuring gross capital fixed formation (GFCF), which is regularly used as a proxy for investment activity, needs more scrutiny and could be biasing overall GDP growth estimates....