Free-rider incentives refer to the tendency of individuals or groups to benefit from resources, goods, or services without paying for them, particularly in the context of public goods. This phenomenon arises because public goods are non-excludable and non-rivalrous, meaning that individuals cannot be effectively excluded from using them and one person's use does not diminish another's ability to use them. The free-rider problem can lead to under-provision of these goods, as individuals may rely on others to contribute while avoiding costs themselves.