Amazon made online comparison shopping easy for all. Now it’s Amazon’s turn to comparison shop: for a city to host its new corporate headquarters. It’s looking for which major metropolis will offer the sweetest deal. Unfortunately, the welcome package will most likely be paid for by the city’s taxpayers. Amazon claims it’s worth it in the long run, given how much tax revenue the corporate titan would bring to town. But economists James Harrigan and Antony Davies give this argument a one-star rating.