Mikhail, Walther, and Willis examine whether security analysts improve their performance with experience. They investigate four related questions: (1) Do analysts' forecasts of earnings for a company become more accurate as their experience in following the company increases? (2) Does the market place greater weight on the forecasts from experienced analysts than on those from less experienced analysts in forming its expectation of earnings? (3) Are revisions of stock recommendations from more experienced analysts more profitable than those from less experienced analysts? (4) Is the immediate market response to the issuance of revisions of stock recommendations greater for revisions from experienced analysts? Whether analyst performance improves with experience is related to whether there are consistently O'Brien [1990] and Butler and Lang [1991] find no evidence to suggest that these exist, while Sinha, Brown, and Das [1997] find indications that some analysts consistently outperform the rest. Documenting that performance improves with experience suggests that at least some experienced analysts would eventually become superior analysts. Security analysts' forecasts of earnings and their stock recommendations provide a good setting to examine the influence of experience on performance because performance can be objectively measured. In addition, since the identity of the analyst and the dates on which the