NYSE stocks in two partitioned samples, with and without identifiable public news. We argue that the sequential information … public information as hypothesized by the SIAH. Our analysis further suggests that return volatility is higher in the periods … private information for trading stocks. Using the sample without public news, we find evidence that volume Granger …

to collect, process, and share information about their own status and about their environment, has attained a high degree … information asymmetries concerning individual risk this has positive efficiency effects. Simultaneously with the improvement of … gain relevance. The comprehensiveness of collected pieces of information which can be stored arbitrarily long and …

rationality. The cooperative’sdecision making process has found mechanisms to adapt to the dictates of the market economy …

accordance with some rationality postulate. We offer an alternative nonlinear model where agents exchange their opinions and … information with each other. Such a model yields multiple equilibria, or attracting distributions, that are persistent but subject …

behaviour, which tends to lead to an under-reaction to new market information. …

In recent years a number of market participants called into question the efficiency of the price discoverymechanism in … apprehension ofpractitioners and market analysts. This paper evaluates the efficiency of the price discovery mechanism incocoa … futures markets. Results show that the price discovery mechanism in both LIFFE and NYBOT cocoafutures markets is efficient. In …