"The Sonics clearly generate economic activity,” he said. "The question is whether the Sonics generate new activity.”
He said consumers would simply spend their entertainment money on other options in the area and there would be no "net” impact.
Humphreys said his research has been published in economic journals that require rigorous review by others in the field. He said he knows of no peer-reviewed articles that support the economic modeling done by Hatamiya and that, in fact, there was a broad consensus in his field that there is no net economic impact from the departure of a sports franchise.
Humphreys said it was even possible that the Seattle metropolitan area might be worse off for having sports teams and that Oklahoma City might be worse off when it gets the Sonics.
He did say the team provides intangible benefits, including community spirit and local pride.
But the owners sought to show through a pollster that there wasn't a lot of local pride in the Sonics.
E. Deborah Jay, who heads the Field Research Corp. in California, testified that she designed a poll for the owners that concluded earlier this year that two-thirds of the people 18 and older in Seattle either don't care if the team leaves or think they would be better off if the Sonics leave. The conclusion was the same for the broader metropolitan area.
Jeffrey Johnson, an attorney for the city, noted that, if the poll was correct, nearly 800,000 people 18 and over do care if the Sonics leave.
The city got testimony from one of those, local writer Sherman Alexie, a passionate Sonics fan who has been a season ticket-holder for several years. Alexie said NBA teams draw a more diverse crowd to games than other sports teams because of the large percentage of black players and the many foreign players on rosters.
Alexie said he would attend the games if the Sonics are forced to stay another two years.
"I want two more years of the great gods,” he said.
But Mitchell Ziets, an investment banker whose company specializes in giving advice on sports franchises, testified that, if forced to stay, the Sonics would suffer deeper economic losses because of their lame duck status. Ziets, confirming testimony that had already been given by Sonics executives, predicted the team would lose between $61 million and $65 million over two years.