What determines how trade in a commodity is divided between privately negotiated transactions via "middle men" (dealer/brokers) in a telephone or "dealer market" versus transactions via "market makers" (specialists) at publicly observable bid/ask prices? To address this question, we extend...

Growth in popularity of computer (video) games is a noticeable change in recent years. Electronic entertainment increasingly engages the wider society and reaches to new audiences by offering them satisfy of wide variety of needs and aspirations. As a mass media games not only provide...