Those who believe that doctors do not keep up with medical developments are also using the web to pester scientists directly.

ECONOMIST: Go on, it��s good for you

You also have to pester the restaurant staff with special requests.

CNN: The story

By signing deals with the banks, they have been able to reach the small cadre of customers dogged enough to pester their banks for third-party funds.

ECONOMIST: Local restrictions permitting

The reports suggested Mr George had threatened to pester and harass Ms Cole and her colleagues so he could meet the Girls Aloud singer and X Factor judge.

BBC: Barry George wins libel damages over obsession claims

Some say they do not want to finance the police who pester them.

ECONOMIST: A ticket to prosperity

His firm operates through a network of locals who knock on doors and pester their acquaintances to buy lipstick and shampoo.

ECONOMIST: Business in China and the West

But successive studies have shown that the commercialisation of childhood - not to mention the ever-present fear of pester power - are serious concerns for parents.

BBC: Is Mr Potato Head to blame for 'pester power' ads?

It is painful to acknowledge, but marketers were right all along: pester power works.

ECONOMIST: Parents can make things worse

About 50 supporters of the campaign have signed a letter to the Telegraph which says advertisers make "heavy use of pester power because it is more effective than targeting parents directly".

BBC: Call for ban on under-11s advertising

Det Ch Insp Dave Pester, from Greater Manchester Police, appealed for witnesses to come forward.

BBC: Serious 'spanner' assault after car rammed in Manchester

Tamara Pester, a Denver lawyer, has created a game called Passover Bingo to play at the dinner table.

WSJ: What's Plaguing Passover Feasts? Some Say Rituals Need Spicing Up