Although Some Economists Believe Network Externalities Are Important Barriers to Entry

question 224

Multiple Choice

Although some economists believe network externalities are important barriers to entry, other economists disagree because

• A)they believe that the dominant positions of firms that are supposedly due to network externalities are to a greater extent the result of the efficiency of firms in offering products that satisfy consumer preferences.
• B)they believe that most examples of network externalities are really barriers to entry caused by the control of a key resource.
• C)network externalities are really negative externalities.
• D)they believe that the dominant positions of firms that are supposedly due to network externalities are to a greater extent the result of economies of scale.

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