The Federal Reserve says Taylor Swift's Eras Tour boosted the economy. One market research firm estimates she could add $5 billion

The Federal Reserve Bank of Philadelphia announced this month that Taylor Swift's tour helped boost travel and tourism in the region, a claim also made by several other U.S. cities regarding the musician's widely popular concerts. 

Market research firm QuestionPro estimated last month that her tour could help add $5 billion to the worldwide economy. 

Following the pop star's Eras Tour stop in Philadelphia in May, the Federal Reserve Bank of Philadelphia, one of the reserve's 12 regional banks, said in its "Beige Book" that tourism in the area continued to show slight growth.