Introduction to Sociology/Economy/Informal economy

It is a classification of a worker receiving compensation that occurs outside of the formal structure of employment. It is therefore not subject to the normal force of the tax registration and, in general, this is done by trading practical.In the informal economy, people do the job of "off-book accounting".

I think, the range of informal economy is wide.And, there are advantages and disadvantages to it.

I wonder about what there is a kind of informal economy.