hat is the difference between direct and indirect network effects?

Multiple choice question.

Direct network effects involve only a single network of users connected to a digital platform, whereas indirect network effects involve two or more networks.

Indirect network effects involve only a single network of users connected to a digital platform, whereas direct network effects involve two or more networks.

Indirect network effects are beneficial to network users, but direct network effects are harmful to network users.

Direct network effects are beneficial to network users, but indirect network effects are harmful to network users.