It also can cause problems for Mr. Catsimatidis and could be contributing to a perception in the city's political classes that he isn't a serious candidate.

WSJ: Mayoral Candidate Catsimatidis Doesn't Lack for Ideas

"The message that goes out is that Belfast is a happening city, that Belfast is a music city and that changes the perception of Belfast, " he said.

BBC: MTV European Music Awards are 'game changer' for Belfast

Whatever her personal attitude to Liverpool, the perception that the Conservatives are hostile to the city remains, according to Prof Tonge.

BBC: Why Liverpool never loved Margaret Thatcher

The carrier boosted spending this year particularly in the key markets of New York City and San Francisco, but still struggles with the perception its network is weak.

WSJ: Verizon to Offer iPhone Users Unlimited Data Plans

LONDON, England (CNN) -- The concept cars shown at the Paris motor show this week might be a glimpse of the shape of things to come, but across the Atlantic a car is being developed that is radically reimagining the automobile and could also transform our perception of how we use it in the city.

CNN: Reinventing the wheel

The perception is that Melbourne is a trifle dull, a city in decline.

ECONOMIST: Melbourne

The exhibit, which opens this week in New York City, is both a feat of scientific wonderment and an ironic exploration of perception, down to the upside down goggles that visitors can use to invert their view of the show.

FORBES: Carsten H?ller: Experience at the New Museum