What type of economies occur when a firm buys inputs in bulk, reducing average costs?

• A. Marketing Economies of Scale
• B. Managerial Economies of Scale
• C. Economies of Scale
• D. Purchasing Economies of Scale

Answer: (D)

Buying inputs in bulk lowers the average cost per unit because the firm can obtain quantity discounts, spread procurement and handling costs over more units, and often gain better terms from suppliers. This is exactly what purchasing economies of scale describe—the cost savings come from how the firm buys input materials, not from selling, managing, or producing more in general.

The other ideas refer to different ways costs can fall as output grows: marketing economies come from spreading advertising and distribution costs across more units; managerial economies come from gaining efficiency through specialized roles and better organization; while the broad term economies of scale covers all efficiency gains from increasing scale, the specific savings here come from bulk purchasing.