"Determination of black money sent to foreign countries by Indian persons is subject matter of investigation and other follow-up actions by relevant law enforcement agencies, including Income Tax Department, Enforcement Directorate, CBI etc, which is on-going.
"However, details regarding the amount of money involved in such cases are not maintained centrally," Minister of State for Finance Jayant Sinha said in a written reply to Rajya Sabha.
Asked whether Indian share in black money stashed in tax havens across the world is at USD 152-181 billion, as per the recent estimate by economists from Bank of Italy, he said there seems to be no empirical evidence to suggest that the figures arrived at on the basis of certain assumptions and presumptions, necessarily represent Indian's share in black money stashed in tax havens.
These economists have reportedly analysed data from IMF and the Bank of International Settlement (BIS) and applied certain assumptions to arrive at the estimation, he added.
The minister pointed out that by applying another set of assumptions, the same economists have reportedly estimated Indian share in black assets at USD 4-5 billion.
"In the context of these estimation, they have reportedly put the caveat that these estimations have to be considered with great care and in no way can represent firm data," Sinha said.