Jimmy Kimmel jokes that “Tax day is the day that ordinary Americans send their money to Washington, D.C., and wealthy Americans send their money to the Cayman Islands.” Tax day is now the day when Medtronic, a leading medical device company headquartered in Minneapolis, will be sending its money to Ireland. On June 15th, Medtronic and Irish healthcare company Covidien PLC announced they had signed an agreement in which the former would acquire the latter for approximately $42.9 billion. One motivation for Medtronic to acquire Covidien has to do with taxes. As part of the acquisition, Medtronic will have a new corporate tax rate of 12.5%, down from a top marginal rate of 35%, just by changing its address from the US to Ireland, using a strategy known as “inversion.”