Purpose – The purpose of this paper is to extend the work of earlier researches relating to insider trading issues in the stock market under a Cournot‐Stackelberg duopoly. Design/methodology/approach – This paper models that the competition among the insiders in the real market be...

Theil (1963) suggested a mixed estimator when there is prior information used in regression analysis. It implies that the investigator not only estimates a parameter based on the sample data, but also combines the prior information by formulating it in terms of unbiased estimates and their...

Purpose – The purpose of this paper is to extend the work of earlier researches relating to insider trading issues in the stock market under a Cournot-Stackelberg duopoly. Design/methodology/approach – This paper models that the competition among the insiders in the real market be...