(The market price for accessing such data, of course, is not necessarily negligible in the case of proprietary data, especially if they possess monopoly value). On the face of it, there are limits to what statisticians can do with data that are not collected primarily for statistical purposes. The sample design, when the concept is at all applicable to such data, is often obscure.
There are other areas, however, which have proven to be more difficult. Compliance with the liquidity coverage ratio (LCR) presents a challenge for countries like South Africa with less liquid corporate debt capital markets and limited availability of government debt securities.