Two-sided markets are the new issues in economic theory and have been studied since the beginning of the 21th century. Barriers to entry are also important to provide a balanced full competition condition in markets. Generally, incumbent firms don’t want new rivals because new rivals usually...

In markets we witness firms competing to satisfy the needs of consumers. The reason of their activity is to maximize their profits. On the other hand consumers try to maximize their utility by looking for goods with highest quality and cheapest price. Though in theory (perfect competition...