Here is the definition of social institutions according to the economists

a. Koentjaraningrat, social institutions are the norm, especially a system that set a steady course of action patterns (official) to meet the specific needs of men in public life.

b. Soerjono Soekanto, social institutions as the set of all actions on a range of basic needs in life.

c. Paul B. Horton and Chester L. Hunt, the institution is a system of norms to achieve a goal or perform activities that are deemed important by the community.