The study, conducted by the chief economist of the Sabér Research Institute, projected state tax revenue of $9.5 million and municipal tax revenue of $4.4 million stemming from the event.

Earlier this month, Texas officials, led by Lt. Gov. Dan Patrick, a Republican, proposed legislation that would require transgender people to use bathrooms in government buildings and public schools and universities based on their “biological sex,” overriding any local rules to the contrary (potentially including a nondiscrimination ordinance that, the committee spokeswoman noted, San Antonio has). The proposal is known as Senate Bill 6.

Jeff Coyle, San Antonio’s director of government and public affairs, declined to comment on the specifics of the bill. “What it all comes down to,” he said, “is the message we send to the rest of the country as a state: Are we welcoming, are we open for business, or are we restrictive?”

The N.C.A.A. has not commented on the Texas bill.

The bill strikes many observers as similar to the North Carolina law that prompted the N.C.A.A. to move championship events out of the state, including games in the early rounds of the Division I men’s basketball tournament. The N.B.A. moved its All-Star Game, and the Atlantic Coast Conference moved its football championship game in response to the law.

Many of North Carolina’s business interests opposed the law, citing economic downsides. The Texas Association of Business has also opposed the bill, in addition to several groups that represent lesbian, gay, bisexual and transgender individuals.