With the recession leaving companies strapped for cash, no deep-pocketed corporate sponsor has emerged for Jerry Jones' $1.2 billion stadium. Whether that changes in the 50 days leading to Super Bowl Sunday is open to speculation. Michael Leeds, an economics professor at Temple, said his 2007 study finds that there's not a huge benefit for companies that buy naming rights: "There's no bigger return for putting the money into naming rights than any alternative they would have," he said, after studying the stock prices of companies involved in 54 stadium naming-rights deals.