Mr Balkam said people should not rely solely on filtering programs to act as a proxy parent controlling web access.

BBC: Net filters fail the children

The MHC is also thought to act as a proxy for general outbreeding, with all the hybrid vigour that can bring.

ECONOMIST: Perfume science

Google Chief Economist Hal Varian has shown that search can act as a proxy for purchasing intent in markets like autos and real estate.

FORBES: Eduardo Saverin Jeopardy for Zuckerberg as Oscars Beckon for The Social Network