This paper investigates whether some individuals are prone to behavioral biases in their 401(k) investments. Using demographic data and allocation information for over 73,000 employees, I examine two allocation biases and a participation bias. The findings suggest that higher salaried employees tend to make significantly better choices. Participants who earn $100, 000 hold 12. 7% less in company stock, are 3% less likely to follow the framing 1/ n heuristic, and are 37.7% more likely to participate than those earning $46, 000. Women make better choices in two of the three cases and I find evidence of mental accounting.

We examine how analysts respond to public information when setting stock recommendations. We model the determinants of analysts' recommendation changes following large stock price movements. We find evidence of an asymmetry following large positive and negative returns. Following large stock price increases, analysts are equally likely to upgrade or downgrade. Following large stock price declines, analysts are more likely to downgrade. This asymmetry exists after accounting for investment banking relationships and herding behavior. This result suggests recommendation changes are “sticky” in one direction, with analysts reluctant to downgrade. Moreover, this result implies that analysts' optimistic bias may vary through time.

Miller (1977) hypothesizes that dispersion of investor opinion in the presence of short-sale constraints leads to stock price overvaluation. However, previous empirical tests of Miller's hypothesis examine the valuation effects of only one of these two necessary conditions. We examine the valuation effects of the interaction between differences of opinion and shortsale constraints. We find robust evidence of significant overvaluation for stocks that are subject to both conditions simultaneously. Stocks are not systematically overvalued when either one of these two conditions is not met.