SEATTLE -- This city’s attorneys rested their federal court case against the SuperSonics this morning after seeking to show that relocating the NBA team to Oklahoma City would deprive fans of a unique experience and cost a two-county area nearly $200 million a year in economic activity. Using an economic consultant and a long-time season ticket holder, the city wanted to persuade U.S. District Judge Marsha Pechman that the 41-year-old franchise has a value beyond the two years of lease payments the team would owe the city if allowed to relocate before the lease expires. The point is crucial to the city’s case since the law allows many landlord-tenant disputes to be resolved with a financial settlement. The team’s Oklahoma City-based owners want to pay about $10 million for the last two years and relocate to Oklahoma City for the next season; the city wants to hold the team to the terms of the lease, which expires in September 2010. Lon Hatamiya, an economist who once served as commerce secretary for the state of California, said he relied on an economic model that is widely used by public and private entities to gauge economic activity and determined that the Sonics have had an impact of nearly $1 billion over five years in King County and one adjoining it. Under cross examination by an attorney for the owners, he said the money spent by fans would not necessarily be spent on other activities. “If your first choice isn’t available, you’re not necessarily going to spend it on your second choice,’’ Hatamiya said. As their first witness, the owners’ attorneys called an economist who has spent the last several years studying the impact of sports franchises on metropolitan areas to counter Hatamiya’s testimony. Brad Humphreys, an economics professor at the University of Alberta, said the departure of a professional football, baseball or basketball team has “no detectable’’ impact on a city. “The Sonics clearly generate economic activity,’’ he said. “The question is whether the Sonics generate new activity." He said consumers simply spend their money on other entertainment options. 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 among economists that there is no economic impact from the departure of a sports franchise. The city also called 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. Though the team’s interim president testified Wednesday that he expects ticket sales to drop if the team is forced to stay here another two years, Alexie said he would attend the games. “I want two more years of the great gods," he said. The trial is scheduled to run through Friday and resume, for a single day, on June 26. Pechman is not planning to make a ruling on whether the team must stay at the trial’s immediate conclusion.