Mayor Bloomberg outlined a broad plan yesterday that he said would create 250,000 private-sector jobs in the next four years by turning New York City into a “friendlier” place for small businesses and a more attractive hub for big businesses.

A central feature of the plan is creating more tourism jobs by advertising New York City and attracting attention grabbing events.

To that end, Mr. Bloomberg said he has already placed calls to the heads of the Democratic and Republican parties, asking them to consider New York City for their 2008 conventions.

“Each one of these things brings a lot to the economy while they’re here in the city, but much more important is when they go home and say New York isn’t like the comedians make fun of it, it is a great place to go,” he said.

Announced in a printing company’s warehouse at the Brooklyn Navy Yard, the proposal was Mr. Bloomberg’s fourth campaign pledge of the 2005 race. It addresses one of his opponent’s chief complaints about the city under the current administration.

The Democratic mayoral nominee, Fernando Ferrer, has repeatedly criticized what he sees as the mayor’s failure to create opportunities for small businesses. He has also faulted the Bloomberg administration for a perceived failure to create an environment where young black and Hispanic workers can find jobs.

Mr. Bloomberg said yesterday that the critics are wrong. He said 50,000 more people are working now in New York City than a year ago. He also said that by rezoning areas like the far West Side and working to bring new industries, such as biotechnology, to the city, his administration has made great strides in setting the stage for economic development. In addition, he said, the city is working to create and retain jobs. The city fought, for example, to keep Goldman Sachs in Lower Manhattan, and created a commission to determine how best to help minorities and women get jobs in the building trades.

Mr. Bloomberg said his administration would build on these accomplishments in his second term.

“Two hundred fifty thousand jobs created in the private sector over the next four years will be tough to do, but I’ve always believed you can work up to expectations,” he said. “You don’t want to have to work down to expectations. What we’re doing in this city is making sure that as many people as possible can participate, and you do that by creating the kind of jobs we need for those people coming to this city.”

The mayor’s plan calls for a new “311 telephone and Internet-based service center” for small businesses. The system would help small businesses apply for permits and licenses, and cut the cost and hassle that new small businesses often encounter when interacting with the government.

Mr. Bloomberg said he would target a number of neighborhoods plagued with “chronic unemployment” to receive resources to help train people for jobs and provide support like affordable child care. Mr. Bloomberg said he would also create a strategic growth management plan that would inspect transportation and infrastructure needs throughout the city and map out a strategy to reclaim city property for more efficient uses.

He said Lower Manhattan, too, would be a major focus of his second term economic development program.

He said the city should push the Port Authority of New York and New Jersey, which owns the trade center site, to develop World Trade Center 3 and 4, two buildings that have largely been ignored as developers have focused on the Freedom Tower and the transportation hub. Also, he said he would speak to the Port Authority about making World Trade Center 3 its new headquarters.

A spokesman for the Port Authority, Steven Coleman, said the Port Authority is committed to moving back downtown to the trade center site, although it has not committed to a building.

Mr. Ferrer’s campaign said the mayor’s announcement amounted to an “I’m sorry, I’ll try to do better” plan.

Mr. Ferrer’s spokeswoman, Jen Bluestein, said, “Mike Bloomberg’s cheerfully oblivious ‘vision’ for New York City’s economy serves as a breathtaking reminder of all that the Mayor hasn’t been focusing on these past four years. Apparently, Mike Bloomberg was unaware that, over the last four years: the World Trade Center site has remained an undeveloped gaping hole; certain communities, particularly African-American and Latino communities, suffer from chronic unemployment; New York has a punishing anti-small business climate; and, of course, Harlem is already a premiere cultural destination for African-American media. We’d be happy to introduce him to the crown jewel of that cultural center – the Apollo Theater.”