Charging a lower per-unit price for a larger family pack of soap than for a small pack is an example of:

1. Second degree discrimination charges different prices for different quantities purchased. 2. Larger quantities are offered at a lower unit price. 3. A family pack costing less per kg than a small pack fits this pattern exactly. 4. So this is second degree price discrimination, capturing only part of consumer surplus. _Source: ICAI BoS CA Foundation Paper 4 Business Economics, Ch 4 Unit III "Price-Output Determination under Different Market Forms", p.16_