On the Fact that (According to James J. Hill's Business Records) American Exports to Japan and China Dropped by 40% Between 1905 and 1907 (the Years After the Hepburn Act Which Made it Illegal for Railroads to Offer Discounts)

How many more examples of the unintended consequences of government regulation do you need? Please, let me know in that I do have more, quite a few more.