the informal economy is that part of economy which is not reported in official statistics such as the gross domestic product of a country. the informal economy is not taxed, and includes the black market. in developing countries over 70% of the people work in this form of economy. they are self-employed, because it is difficult to find an employer to hire them. people working in this form of economy have no social benefits or social security, which are usually only given by the state to those who have made tax contributions.