Answer:
Informal Economy
Step-by-step explanation:
An informal economy is a segment of any society not taxed or controlled by some type of government. The concept is usually applied to self-employment in small unregistered enterprises.
Max spends most of his time in the house taking care of his children and his sister’s children in return his sister lends his family an extra apartment she has in her multifamily home. This situation is referred to as informal economy.