It remains that if we cling to outdated principles no matter how clever our models we change nothing.
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Economists tend to cling to whatever assumptions are required to use the techniques they favour.
Some of the smaller ones throw their arms around your waist and cling to you.
Yet some still cling to protectionist tariffs like an overgrown child to a security blanket.
But dictatorial leaders, who cling to power as their countries crumble, are also to blame.
People are less optimistic now than ever before, and they cling to their jobs.
Dealers who cling to tradition are bound to be road kill sooner rather than later.
I, for one, still cling to the belief that certain tasks require skill and training.
The simple answer is that we cling to the misguided belief that humans are rational creatures.
In private, Mr Clegg and his inner circle cling to reason as closely as in public.
Many companies cling to the misguided notion that their strategic plans will unfold exactly as written.
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For instance, getting rid of industrial and agricultural subsidies makes sense, but politicians cling to them.
They promised Mubarak unlimited financial support for Egypt if he agreed to cling to power.
The manner in which you cling to these obsolete 18th century ideals is remarkable.
For years, the state has sought to attract new businesses and cling to existing ones.
Some see it as a last-ditch attempt by Turkey's old guard to cling to power.
This swirling slows down the flow, and thus helps the fluid to cling to the surface.
But it was politically important for the chancellor that he could cling to that tiny continued fall.
These cling to their political autonomy, which, as they see it, includes total control over local transport.
Less tangibly, the attacks may have made voters cling to the familiar from fear of the unknown.
In sharp contrast, the Europeans, Japanese and Americans still cling to the idea that inflation is the answer.
This is, at the very least, certainly no time for Gorbachev to be encouraged to cling to power.
In this situation, Japan must above all cling to and strengthen its defence alliance with the United States.
Early gains dwindled, though the Dow Jones industrial average managed to cling to an 11-point advance at 13, 118.
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Mubarak had sought to cling to power, handing some of his authorities to Suleiman while keeping his title.
Politicians cling to their party lines with no vision for how they are actually going to get anything done.
These weaknesses may play to pessimists' fears, but at least for now the optimists have something to cling to.
But she was famous, always touring, always working, always trying to cling to the New York Times best-seller list.
Yet they still cling to the belief that they can somehow squeeze some mileage out of a dead horse.
Finally, the team investigated the force with which toe pads cling to surfaces.
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