In an attempt to boost the city's flagging post-11 September economy, the mayor of New York City, Michael Bloomberg, has declared tax-free shopping days for people who shop downtown, where businesses have been hardest hit. A new study – requested by New York members of the US Congress – has found that the 11 September attacks cost the city $83 bn. Mr Bloomberg announced nine days of tax-free shopping over the next three months. “From Soho to the Lower East Side, from Chinatown to Battery Park City, I encourage you to spend your money – tax free,” said Mr Bloomberg.

The first tax-free stretch of three days will start on Sunday, to be followed by further three-day tax holidays in July and August.

Whatever people – tourists or residents – buy in shops and restaurants in Lower Manhattan will be free of the 8.25% sales tax, so long as purchases exceed $500 in value.