Question
Differentiate between substitute goods and complementary goods.

Answer

S. No. Basis Substitute Goods Complementary Goods
1. Meaning Substitute goods are those which can be used in place of another goods and gives the same satisfaction to a consumer. Complementary goods are those which are useless in the absence of other goods and which are demanded jointly.
2. Relation ship There always exists a positive direct relationship between the price of substitute goods and demand of a given commodity. There always exists an inverse ship relationship between the price of complementary goods and demand of given commodity.
3. Schedule
Price of Pepsi Given Commodity] * [per unit] Quantity Demanded of Pepsi when Price of Coke Substitute good) = * 15 [units] Quantity Demanded of Pepsi when Price of Coke [Substitute good) = * 18 [units]
15 50 55
16 45 52
Price of Pen [Given Commodity] * [per unit] Quantity Demanded of Pen when Price of Refill [Complimentary good] = *3 [units] Quantity Demanded of Pen when Price of Refill [Complimentary good) = *5 [units]
10 50 45
20 45 40
4. Diagram

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