A broad-ranging seminar on housing economics for representatives of labor associations, the housing industry and others will be sponsored here Nov. 7 and 8 by the National Association of Home Builders.

"We are highly concerned by the combination of high interest rates and tight money and want a wide-ranging discussion of the issues among legislators, business and industry professionals and, of course, Paul Volcker (chairman of the Federal Reserve Board)," said Vondale S. Gravlee, NAHB president. "I especially hope that he will be among the 10 to 15 speakes."

Gravlee has predicted a near-calamitous decline in housing that will affect many other segments of the economy.

NAHB recently postponed its semi-annual housing forecast seminar, which was to be held yesterday. It wil be held late in November.

"If there's one thing we want to make clear, it's that this summit conference is going to be a sounding board for our own viewpoints," said Gravlee, who is a builder in Birmingham, Ala. "We realize that some of the speakers will support the Fed actions that we deplore. But we hope this will be the start of discussions that eventually will result in avoiding the endless ups and downs in the housing industry."