This is “One-Sided or Two-Sided Markets?”, section 5.3 from the book Getting the Most Out of Information Systems: A Manager's Guide (v. 1.0).
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After studying this section you should be able to do the following:
To understand the key sources of network value, it’s important to recognize the structure of the network. Some networks derive most of their value from a single class of users. An example of this kind of network is instant messaging (IM). While there might be some add-ons for the most popular IM tools, they don’t influence most users’ choice of an IM system. You pretty much choose one IM tool over another based on how many of your contacts you can reach. Economists would call IM a one-sided marketA market that derives most of its value from a single class of users (e.g., instant messaging). (a market that derives most of its value from a single class of users), and the network effects derived from IM users attracting more IM users as being same-side exchange benefitsBenefits derived by interaction among members of a single class of participant (e.g., the exchange value when increasing numbers of IM users gain the ability to message each other). (benefits derived by interaction among members of a single class of participant).
But some markets are comprised of two distinct categories of network participant. Consider video games. People buy a video game console largely based on the number of really great games available for the system. Software developers write games based on their ability to reach the greatest number of paying customers, and so they’re most likely to write for the most popular consoles, first. Economists would call this kind of network a two-sided marketNetwork markets comprised of two distinct categories of participant, both of which that are needed to deliver value for the network to work (e.g., video game console owners and developers of video games). (network markets comprised of two distinct categories of participant, both of which that are needed to deliver value for the network to work). When an increase in the number of users on one side of the market (say console owners) creates a rise in the other side (software developers), that’s called a cross-side exchange benefitWhen an increase in the number of users on one side of the market (say console owners) creates a rise in the other side (software developers)..
IM is considered a one-sided market, where the value-creating, positive-feedback loop of network effects comes mostly from same-side benefits from a single group (IM members who attract other IM members who want to communicate with them). Video game consoles, however, are considered a two-sided network, where significant benefits come from two distinct classes of users that add value from cross-side benefits by attracting their opposite group. In the game console market, more users of a console attract more developers who write more software for that console, and that attracts more users. Game availability is the main reason the Sony PlayStation 2 dominated over the original Xbox.
It is possible that a network may have both same-side and cross-side benefits. Xbox 360 benefits from cross-side benefits in that more users of that console attract more developers writing more software titles and vice versa. However, the Xbox Live network that allows users to play against each other has same-side benefits. If your buddies use Xbox Live and you want to play against them, you’re more likely to buy an Xbox.