Here is a short excerpt from Michael Barone, the political analyst that wrote the article;
This leads to a second point, which is that growth tends to be stronger where taxes are lower. Seven of the nine states that do not levy an income tax grew faster than the national average. The other two, South Dakota and New Hampshire, had the fastest growth in their regions, the Midwest and New England.Perhaps the Montana legislature should look at the facts and actually do some over-haul of our state tax system?
Altogether, 35 percent of the nation's total population growth occurred in these nine non-taxing states, which accounted for just 19 percent of total population at the beginning of the decade.