E ciency in the IPO (Initial Public O ering) aftermarket is tested without imposing any restrictions on the priors about potential default at the issue date. Merging Ritter's extended dataset (which covers the period 1975-84) with the CRSP tapes, IPOs are followed up to ten years after issue. Across all IPOs, or when stratifying IPOs according to issue underpricing, industry a liation or rank o...

This paper seeks to detect hot and cold IPO cycles in the Tunisian share market using a Markov regime switching model. Using a set of IPO activity measures (number of IPOs, level of underpricing, market conditions and duration), we establish a model which estimates these activity measures in hot and cold periods respectively. We depict the turning points from 1998 to 2012 for each activity meas...

This paper studies pricing patterns in a speculative market with asymmetric information populated by both sophisticated and naive traders. Three pricing regimes arise in equilibrium: perfect pricing, with prices equalling asset values, partial mispricing and complete mispricing. Perfect pricing obtains when the presence of naive traders is small although not necessarily zero. When the fraction ...