Two-sided markets created by information platforms increasingly are a feature of how Internet services are monetized -- e.g. similar to how subscribers and advertisers are two sides of a "newspaper platform." Users and advertisers are two sides of the Google platform (albeit one side doesn't subscribe), similar to how viewers and advertisers were two sides of a TV station's business model. How do you use demand/supply curves to analyze and understand two-sided markets? What are the implications for price discrimination? What are the implications for monopoly? What are the implications for dynamic competition if an industry sector is prohibited from implementing a two-sided market?