👉 In economics, marginality refers to the fact that a person or group has an advantage in terms of their income or wealth compared to another group. This means that if someone's income increases by one unit, it is expected that their share of the total income will increase by one unit as well (assuming all other factors remain constant). For example, if you have two friends who both earn $50,000 per year, and one earns an additional $100,00
