“In Europe, the relative underperformance of value [stocks] versus growth has not been as sustained since the early 1980’s. In the US, according to research by O’Shaughnessy Asset Management, investors have to go back to 1926-1941 to find a comparable period of sustained relative performance.”
That’s from Inflection Point, a blog post in which Marc Rubinstein takes a long term look at the valuation of stocks and the impact of technology on markets and the economy. The article has a lot of references.
Update: Chris Meredith of O’Shaughnessy Asset Management talked about his research on Odd Lots.