What is the fine-grained topic of the following text: During the Summer of 2002, Jonathan and Leslie Bari, Chairman and Vice Chairman of The Constitutional, researched, analyzed and wrote about the Philadelphia hospitality industry, specifically pertaining to the Independence National Historical area, and the need for a free, self-guided walking tour of Historic Philadelphia (and the Old City section). Only return the topic.
Research and analysis of the Philadelphia hospitality industry and the need for a self-guided tour of Historic Philadelphia.