What are same-side and cross-side network effects?

What are same-side and cross-side network effects?

• A. Same-side effects occur when more users on the same side increase value for that side; cross-side effects occur when more users on one side increase value for another side.
• B. Same-side effects occur when users leave; cross-side effects occur when platform expands.
• C. Same-side effects apply only to physical goods; cross-side apply only to digital goods.
• D. There are no such effects.

Answer: (A)

In two-sided platforms, value grows as more participants join, but the direction of that value growth matters. Same-side network effects happen when adding more users on the same side of the platform increases value for others on that same side—people like to be where their peers are, so each additional user on your side makes the platform more useful for everyone already on that side. Think of a social network: the more friends you have on your side, the more valuable the network is to you and to others with similar roles or interests. Cross-side network effects occur when growth on one side makes the platform more valuable to the other side. A classic example is a marketplace with buyers and sellers: more buyers attract more sellers because there’s more demand, and more sellers attract more buyers because there’s more inventory. The platform becomes more valuable to each side as the other side grows. That’s why this option is correct: it accurately defines both effects—same-side increases within the same group, and cross-side increases across the groups. The other statements misstate the concept by focusing on things like leaving versus expansion, or by tying the effects to physical vs digital goods, or by denying the existence of such effects.

In two-sided platforms, value grows as more participants join, but the direction of that value growth matters. Same-side network effects happen when adding more users on the same side of the platform increases value for others on that same side—people like to be where their peers are, so each additional user on your side makes the platform more useful for everyone already on that side. Think of a social network: the more friends you have on your side, the more valuable the network is to you and to others with similar roles or interests.

Cross-side network effects occur when growth on one side makes the platform more valuable to the other side. A classic example is a marketplace with buyers and sellers: more buyers attract more sellers because there’s more demand, and more sellers attract more buyers because there’s more inventory. The platform becomes more valuable to each side as the other side grows.

That’s why this option is correct: it accurately defines both effects—same-side increases within the same group, and cross-side increases across the groups. The other statements misstate the concept by focusing on things like leaving versus expansion, or by tying the effects to physical vs digital goods, or by denying the existence of such effects.