Randomly spotted this book and snapped it up for literally bargain-bin prices. Here are a list of his quantifiable claims made in 2005, and his justifications supporting those claims. He published an update in 2008. The Stock Selection Strategies at the end are particularly interesting. 1. The SPX will only return 3-5% annually over the next 20 years, in the best case.

• Three components of this forecast: Reversion to the Mean, Valuation Metrics, and Forecasting Models
• Reversion to the Mean
• There are problems with using a static stock return assumption. Although the average real return of the SPX has been 7.2%, 20year rolling windows have ranged from 0.29% to 13.85% real returns.
• 20 year windows that returned more than 1 s.d. above the average subsequently returned ~2.5% real p.a., while those that returned <1 s.d. ...