1. First-time subscribers to the Economist pay a lower rate than repeat subscribers. Is this a case of price discrimination? If so, of what type?

2. Supermarkets frequently issue coupons that entitle consumers to a discount in selected products. Is this a form of price discrimination? What type? Empirical evidence suggests that paper towels are significantly more expensive in markets offering coupons than in markets without coupons. Is this consistent with your previous answer about price discrimination?