disadvantages of cigarette smoking Health Effects on Your Body Smoking and Your Heart -

This provided estimates in each age category (45, 55, and 65 years) because the risk of cardiovascular disease changes with age.15 The reference value of 1.0 (never smokers) was not included in the regression to avoid forcing the model through the origin and unduly affecting the dose-response relation (also because we were ultimately interested only in comparing between high and low consumption)

However, even when assuming that this was a causal relationship, these tax increases did not substantially impact real prices, did not prevent a widening price range between cheapest and most expensive FM-P products, and made little impact on the lowest price paid for RYO tobacco

doi: 10.1016/S0008-6363(01)00381-9 59

In general, younger people have lower levels of disposable income and are less likely to start smoking or use tobacco as prices increase, meaning they are more sensitive to price changes than older populations