ECO200Y5 Lecture Notes - Ceteris Paribus, Doritos, Demand Curve

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15 Oct 2013

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Four key assumptions of the supply and demand model in competitive markets: Demand is affected by (the determinants of demand): ceteris paribus all else equal. ________________________________ condition: qd and price. Law of demand- ______________________ or __________________________, ceteris paribas. Demand curve: the graphical representation of the relationship between quantity demanded and the price of a commodity, ceteris paribas. Activity: turn to the person next to you, and graph the following demand curve. Qd=240- 2p, where qd is the quantity demanded in crates of toy mice and p is the price per crate. Inverse demand curve: p=f( ) If something else that influences how much people want to buy changes, then ______________ changes (shift the entire curve) If price changes, then __________ changes (move along demand curve) Qs is influenced by (determinants of supply): 2. Supply curve: the graphical representation of the relationship between quantity supplied and the price of a commodity, ceteris paribas.

Related Questions

A. Think about a product that you have purchased recently (e.g. soda, diapers, takeout meals, milk, shoes, manicure/pedicure, video game, etc.). Explain how the law of demand affected your purchase. Give specific examples of how the determinants of demand and supply affect this product (T-I-P-E-N and P-R-E-S-T). What happens to the demand curve and the supply curve when any of these determinants change? Give examples of scenarios that would cause a change in demand versus a movement along the same demand curve and supply curve for this product. Discuss the new equilibrium price and quantity that result from these changes. Can you demonstrate some of these changes graphically?

B. For your selected product, if the government places a mandated price ABOVE the equilibrium price, how would this affect the market equilibrium?

C. Would you rather have the forces of demand and supply determine the price of gasoline, or would you prefer a government-mandated price ceiling? What problems would a price ceiling on gasoline bring in this market?

The market demand curve

a. slopes upward.

b. is found by vertically adding the individual demand curves.

c. represents the sum of the quantities demanded by all the buyers at each price of the good.

d. represents the sum of the prices that all the buyers are willing to pay for a given quantity of the good.

When we move along a given demand curve,

all nonprice determinants of demand are held constant.

only price is held constant.

all determinants of quantity demanded are held constant.

d. income and price are held constant.

When the price of a good or service changes,

	a.	there is a movement along a given demand curve.
	b.	the demand curve shifts in the opposite direction.
	c.	the supply curve shifts in the opposite direction.
	d.	the demand curve shifts in the same direction.

Section I: Supply & Demand Analysis (Chapter 3) In each of the following 10 questions, show what happens to the Demand, Supply, equilibrium price and equilibrium quantity of copper. Show an increase by use of +, a decrease with a -, and no change with 0 (thatâs a zero, not an O or o). Although in the real world, both supply and demand are constantly changing, in the model we are using here, only one curve shifts per problem. So, if demand goes + or -, supply will be 0, and vice versa. In no case will equilibrium price or equilibrium quantity be 0. You may want to sketch out the supply and demand curve analysis to help in answering the questions. You will also be required to identify which determinant (of demand or supply) has changed, thus causing the shift. Rather than actually writing in the determinant, fill in the blank with the number that corresponds to the relevant determinant, based upon the following list. You may want to refer to the lecture notes entitled Determinants of Demand & Supply in the COURSE CONTENTS section. For questions 1 - 10, refer back to this list. Some you may want to use more than once, some you won't use at all. Copy and paste this list to an MS Word document and then print it out if you don't want to keep scrolling back and forth between this list and the question you're trying to answer. Determinants of Demand: 1. Change in buyer tastes 2. Change in number of buyers 3. Change in income 4. Change in the prices of related goods (on the demand side) 5. Change in consumer expectations Determinants of Supply: 6. Change in resource prices 7. Change in technology 8. Changes in taxes and subsidies 9. Change in prices of related goods (on the supply side) 10. Change in producer expectations 11. Change in the number of suppliers. For example, if a rightward shift in the supply curve for an item were caused by an increase in the number of producers of that item, you would indicate this be entering 11 into the relevant blank. If the demand curve shifted to the left because people didn't like that item anymore (like mimeograph machines), you'd enter 1 into the blank. Q#1 President Trump signs into law a bill that says the U.S. government will subsidize the construction of new homes, office buildings, bridges, and other infrastructure projects requiring copper. Demand; Supply: Equilibrium Price: Equilibrium Quantity Exchanged; Which determinant changed?: Q#2 Non-capitalist economies around the world begin a phase of rapid economic development, construction and growth, becoming increasingly wealthy, as they begin to adopt more capitalist institutions, as in China, Russia, and the former communist countries of East Europe. Demand; Supply: Equilibrium Price: Equilibrium Quantity Exchanged: Which determinant changed?

ECO200Y5 Lecture Notes - Ceteris Paribus, Doritos, Demand Curve

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