A group has 100 members. Each person can choose to participate or not participate in a common project. Ifnof them participate in the project, then each participant derives the benefitp(n)=n, and each of the (100n) shirkers derives the benefits(n)=4+3n.

1. Is this an example of a prisoners' dilemma, a game of chicken, or an assurance game?

For the answer here it says 'This collective-action problem is an example of prisoners' dilemma becauses(n)> p(n) for all n' but there is another answer that says 'This game is a prisoners' dilemma sinces(n) is greater thanp(n+ 1) for alln.' Which one is true and what's the difference?