how big is the black market 
the nature of the black market make measuring its size very difficult and estimates vary a lot it has been estimated that the black market constitutes much as 36 percent of the gross domestic product gdp of developing nations and 13 percent of developed countries gdp 5the bottom linea black market a market that exists outside of government sanctioned channels black markets trade in illegal goods and services legal goods and services to avoid taxes or both examples of black markets include the sale of illegal drugs weapons human trafficking and the illegal wildlife trade black markets can have a negative impact on the economy because the activity is not reported and taxes are not collected on the transactions black markets do provide some benefits such as creating jobs for those who may not be able to find employment in traditional markets and allowing access to medicine and healthcare to those individuals that might not have had access otherwise 