The 2012 Olympic games have wrapped up in London, and cities across the world are already considering whether to bid to host the 2024 installment. One of those cities is Baltimore. (Heck, I guess there’s plenty of empty space.) Proponents of Baltimore 2024 are dazzled by estimates of $6.7 billion in revenue and the creation of 70,000 jobs. But is coming out on top economically after hosting the gargantuan international event a realistic expectation?