WASHINGTON — World leaders will meet Nov. 15 in Washington to address the global financial crisis; the first in a series of summits to mitigate what economists predict could be a long and deep downturn.

In making the announcement, White House spokeswoman Dana Perino said the first meeting will focus on the underlying causes of the financial crisis, the global response and the principles that should guide any reforms.

The summit will bring together leaders of the Japan, the United Kingdom, France, Germany, Italy, Canada and the United States, the European Union China, Brazil, India, Russia, South Korea and other major economies. She said the White House would seek input from the winner of the U.S. presidential election who will take office on Jan. 20.

Perino said countries would come to the summit with different approaches about what’s needed to fix the system. “I don’t believe that you’ll have any details coming out of this meeting in terms of things that everyone agrees to at the first meeting,” she said.

The collapse of the housing market in the United States led to the tanking of the broader financial system, prompting a credit freeze in this country and around the globe. So far, though, a string of drastic actions by the Federal Reserve and the Bush administration has yet to turn around the economy. Businesses are reluctant to hire and boost capital investments, consumers have hunkered down, and all the economy’s problems are feeding off each other.

This will be the first in a series of summits to bring the leaders together. At the first meeting, working groups will be set up to develop recommendations to be considered by leaders in subsequent summits. The White House will host a dinner on the eve of the summit. The location of the meeting, however, has not yet been announced.

Bush, French President Nicolas Sarkozy and European Commission President Jose Manuel Barroso, who met at the Camp David, Md., presidential retreat last week, announced the series of summit, saying the international community needs to work together to address the credit crisis that has shaken markets the world over.

Bush has backed the steps that European nations have taken to fix the financial markets and is willing to listen to a range of ideas from both developed and developing nations. But he hasn’t signed on to the more ambitious, broad-stroke reforms that some European leaders have in mind to avoid a repeat of the market crisis that rippled around the globe.

At Camp David, Bush warned that any international effort should preserve what he calls democratic capitalism — free markets, free enterprise, and free trade.

Perino said not to expect the summit to yield decisions on new policy or regulation. The task of putting “meat on the bones” will be up to financial experts in the countries after the world leaders review the causes of the crisis, the response so far, and the principles of reform that should be adopted.

“A lot of work will have to be done at the task force level, the working group level,” she said.

The summit will take place 11 days after the U.S. presidential election, with Bush’s clout diminishing.

Perino said there was no way to control the timing of the financial crisis, but that world leaders agreed that a summit was needed, and that Bush was excited to host it. “We will seek the input of the president-elect,” she said.

Perino added that the two presidential candidates were made aware of Bush’s intentions and “they were supportive of the idea.”

Senate Majority Leader Harry Reid said the summit was “a positive, constructive step.”

“I am hopeful that the meeting will not only address the immediate crisis facing the global economy but will begin to make the international financial system stronger and more secure,” Reid said.