The following sentence says black markets accounted for 10-15% of all cigarettes sold illegally. But, black markets are places where all cigarettes are sold illegally, like criminal activities. Could you explain why the author says black markets are part of illegal tobacco trade? Or, is this a typo?
Crucially, some countries strengthened efforts to detect and curb smuggling at the same time. Black markets were often smaller than thought, with only 10-15% of all cigarettes sold illegally. When taxes went up, this share typically rose by just a few percentage points. In poorer countries, tax evasion will be higher, but even then taxes will cut smoking and increase revenues if they are well administered.