A wide diversity of rankings of opportunity sets are characterized through what is now commonly called the freedom of choice literature. An op-portunity set is better ranked when it provides more freedom. This survey is or-ganized as a typology of the rankings, according to the specific conception of free-dom they capture: freedom of choice, freedom as autonomy, freedom as exercise of significant choices, negative freedom. The role of preferences in freedom rankings is discussed in the conclusion.
Keywords opportunity sets, freedom of choice, well-being, typology