Trumpeting the economic impact of the arts has become a tried-and-true promotional technique over the past several years, and this week, the Atlanta Symphony took its turn at self-congratulation, releasing a consultant’s report that predicts a $2 billion boost to the Georgia economy upon completion of the orchestra’s new $300 million concert hall. “[That] includes $537 million during construction and $1.45 billion during the first 10 years of operation. It should generate $116 million in tax revenues and 2,100 new jobs through 2020, says the report.”