Who is going to be Europe's main technology hub? While London and Berlin both see themselves as claimants to the title, if you look at the numbers (and you take a Eurovision Song Contest view of the Continent) arguably neither can challenge Tel Aviv.

It was Ron Huldai, Tel Aviv's 13-year mayor and a former combat pilot, who, while London's Tech City was not even the subject of an interdepartmental memo, had got on with building a tech center second only to Silicon Valley. He did it not by installing high-speed fiber or hosting conferences. His approach, as he said in a recent interview with The Wall Street Journal, was much simpler.

"Tel Aviv had become a city that people used, not a city they lived in," he said. "We are creating a good place for hi-tech people to live in—I am doing it for the people working in hi-tech," he said.

It is the ''Field of Dreams'' model. If you build it, they will come. It is no coincidence that Tel Aviv was recently named the world¹s best gay city.

"It is about building an environment that is supportive," he said. Young digital entrepreneurs tend to be counter-cultural— attracted to cities that are vibrant, diverse and international. One third of the city is under the age of 35, and there is one bar for every 200 residents.