A self-reinforcing mechanism is a process where an initial action or event leads to further actions that strengthen or amplify the original effect. This can create a cycle that becomes increasingly difficult to change. For example, in economics, when a company gains popularity, it attracts more customers, which in turn boosts its reputation and sales, leading to even more customers. In social contexts, self-reinforcing mechanisms can occur in group dynamics. If a particular behavior is rewarded within a group, it encourages more individuals to engage in that behavior, solidifying it as a norm. This can be seen in peer pressure situations, where the desire to fit in drives individuals to conform.