Hi Professor Damodaran, In discussing mean reversion for
broad equity indexes, here are a
few factors that seem potentially relevant, which I didn't find mention of in your post: 1) Technology network effect: technology revolutions (electricity, transistor, computer, internet, etc) engender decades - long streaks of further invention and commercialization.
The
broader empirical pediatric psychology literature has also found
few links between overcontrol, overinvolvement, or overprotection and poor child adjustment or health outcomes to date (Berg et al., 2007; Mullins et al., 2004; Wiebe et al., 2005) and in fact overcontrol has been shown to serve as a protective
factor in certain contexts (Tolou - Shams, Paikoff, McKirnan, & Holmbeck, 2007).