Every now and then, we observe a fierce price war in a real world market, through which competing firms end up with a Bertrand-like price competition equilibrium. Despite this, very little has been known in the existing literature as to why a price competition market is formed. We address this...

This study investigates the quality of Japanese and US stock markets from the viewpoints of efficiency and fairness. We design a new Internet survey and develop a simple model that can quantitatively explain stock market quality by those data. Our estimation shows that the Japanese stock market...