North America’s sawmills can’t keep up with demand, which has sent wood prices on a meteoric rise. Don’t expect new mills to start popping up though.  Executives in the cyclical business of sawing logs into lumber said they are content to rake in cash while lumber prices are sky-high and aren’t racing out to build new mills, which can cost hundreds of millions dollars and take two years to build from the ground up.  In doing so they are breaking with conventional wisdom in the commodities business, which states that the ...