▽Brad DeLong’s Semi-Daily Journal ●07/27 00:00 BRIEFLY NOTED: For 2021-05-11 TuThings that went whizzing by that I want to remember...First:Here we see a striking difference between Paul Krugman and Larry Summers. Krugman sees models as intuition pumps—and believes strongly, very strongly, that if you cannot make a simple model of it, it is probably wrong. Summers believes that our models are, at best, filing systems (and at worst tools for