THERE ARE TWO TYPES OF ECONOMISTS- make that two types of people- in the world: demand-siders and supply-siders. What's interesting about the two is that they think in vastly different ways about life and human interaction.
This is not a bumper-sticker difference in ideology. Supply-siders do not walk around saying, "Cut taxes and watch prosperity trickle down." And demand-siders do not defend government spending no matter what. They could say these things, but their differences are much bigger and deeper than this.
Demand-siders tend to be pessimistic, fret about greed, worry about leaving people behind, see everything as win-lose, and worry about running out of …