But several of Germany's biggest family firms have not proved so conservative of late.
On the last point, academic studies have not proved a decisive case either way.
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The Medical Practitioners' Tribunal Service ruled the case against surgeon James Richardson was not proved.
Although this is an improvement in many respects, compulsion in Australia has not proved a pensions solution.
But Siac ruled Jordan had not proved Abu Qatada's retrial would be free of evidence obtained by torture.
The United States' stubbornness, so annoying to Libya and American oil companies alike, has not proved very effective.
Progress towards the findings of the 2009 inspection "had not proved to be sustainable", the audit office report says.
He said the school had not proved the reasons for dismissing the pair.
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That night, at a press conference, they strongly contested arguments that they had not proved the drugs were safe.
The Vatican might have rebuked him more, had he not proved in other ways so loyal to church teaching.
The Connolly report on Shared Education has not proved quite so contentious.
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But this time it is beset by problems, and Mr McCain has not proved that he knows how to deal with them.
Liberalisation has not proved as damaging to British morals as critics feared.
Although the Lawrences have not proved that case, they have forced the police to admit that there is a case to answer.
However, she said the research had not proved that loss of serotonin receptors was necessarily a sign that brain cells were being killed off.
But Stoke's gritty, stubborn brand of direct football has not proved popular with the media and particularly with their contemporaries in the top flight.
But work has not proved to be a route out of poverty for everyone, partly because very few of the poor are working full-time.
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Loose agreements have not proved strong enough to stop reckless behaviour.
On March 7, Guidant announced that it was suspending its clinical trials of stents coated with actinomycin-D, because that drug has not proved efficacious in preventing restenosis.
Although Mr Blair has used selection panels to shield him from direct responsibility for choosing candidates, his strong grip on his own party has not proved unpopular.
But jurors, who were deadlocked on three perjury counts, said it was not proved that Bonds lied when he testified that he had not knowingly used steroids.
"Growth in the satellite radio sector has not proved as robust as investors had hoped, and now subscriber gains are coming largely through the auto channel, " Moran said.
The idea of using a liquid with a lower boiling point than water to drive a turbine is nothing new it has simply not proved worthwhile in the past.
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Mr Clinton's lawyers moved to dismiss the sexual-harassment suit bought against him by Paula Jones , arguing that she had not proved she had suffered career harm or serious emotional distress.
This is not proved but is being actively studied.
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Musicians and business owners have welcomed the change, which will allow live music to be played between the hours of 08:00 and 23:00 but it has not proved popular with noise campaigners.
It then took about 30 years to realise that progressive methods had not proved possible to implement successfully in most schools, and that instead many had ended up with an unworkable mess.
Last month, a senior judge ruled Jordan had not proved that the retrial of Abu Qatada - who is currently living under strict bail conditions in London - would be free of evidence obtained by torture.
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