The last time I did the calculation, a Canadian is about 27 times more likely to move to the US than an American is to move to Canada. About one sixth of *all*

The last time I did the calculation, a Canadian is about 27 times more likely to move to the US than an American is to move to Canada. About one sixth of *all* Canadian scientists and engineers move to the US. (Not one sixth of Canadian scientists/engineers who leave their country moving to the US. One sixth of all.) The number of wealthy Americans that move to Canada is, to the first approximation, zero.