At the Tax Foundation's blog, William McBride has the tax angle on the $25 billion acquisition of Forest Labs by Actavis, which last year moved to Ireland from New Jersey: "The new company will be based in Ireland, where the corporate tax rate is 12.5 percent – much lower than the combined U.S. federal and state corporate tax rate of 40 percent or more in New York and New Jersey."
From the New York Times: "In this case, Forest's earnings, which had been getting taxed at a higher United States rate, will eventually be taxed at the lower Irish rate currently paid by Actavis, which executives estimated to be 16 percent. Tax savings will amount to at least $100 million, the companies said."