This special issue of the Journal of Financial Economics includes six
articles that analyze the market microstructure of Nasdaq in various w
ays. The question of the costs of trading on Nasdaq has become content
ious in both the academic and legal/regulatory arenas since the Christ
ie and Schultz (1994) article first noted that many actively traded Na
sdaq stocks were almost never quoted on odd eighths. The articles in t
his symposium bring new and interesting insights to this debate.