The New York state cigarette tax applies equally to low-quality (generic) and high-quality cigarettes. However, the state

Question:

The New York state cigarette tax applies equally to low-quality (generic) and high-quality cigarettes. However, the state cannot collect the tax on sales on Indian reservations. DeCicca et al. (2014) found that people purchase a larger share of low-quality cigarettes on Indian reservations compared to purchases elsewhere in New York. Why?