American corporations earn a significant share of their profits from f
oreign sources, out of which they appear to pay dividends at rates tha
t are three times higher than their payout rates from domestic profits
. Why firms do so is unclear, although this behavior is consistent wit
h the use of dividends to signal profitability. This payout behavior i
mplies that a significant part of the U.S. tax revenue generated by th
e foreign profits of U.S. corporations arises through the taxation of
dividends received by individuals, and that the cost of capital may be
higher for foreign than for domestic operations.