I was surprised – perhaps readers were too – when Economic Principals failed to deliver two weeks in a row. In eighteen years of writing for The Boston Globe, I never paused the Sunday column. There was too much to write about; the space was too valuable, the summer audience in New England too good to pass up. The habit carried over when I moved to the Web; and for the last eight years I have seldom missed a Sunday. In the last couple of weeks, however, I ran into a wall. Plenty else is going on in life: consolidating…