Chapter 4 - The Market Forces of Supply and Demand Flashcards
What is a Market
Sellers (determine supply) and buyers (determine demand)
Competitive Market
Market with many buyers and sellers that are competing against each other, therefore they have a negligible impact on market prices.
Perfectly Competitive Market
- All the goods and services are the same
- So many buyers and sellers that there not one individual or firm that can have influence on market price
Price Takers
In a perfectly competitive market prices are determined by the forces of supply and demand. So, individuals and firms simply have to accept these prices therefore they are price takers.
Quantity of Demand
The amount that a buyer is willing and able to purchase
Law of Demand
When the price of a good or service increases, demand decreases and vice versa. (If all other factors are equal)
Demand Schedule
A table showing the relationship between price and quantity demanded if all other factors are held constant.
Normal Good
When demand for a good decreases when income decreases it is considered a normal good.
Inferior Good
When demand for a good increases when income decreases it is considered an inferior good. (ex. bus rides go up when income goes down because people cant afford individual transportation)
Income (Demand Shifts)
Income increase and decrease is what makes these goods normal or inferior. These goods aren’t always normal or inferior it depends on the situation (income)
Prices of Related Goods
The price of related goods affect the demand of other goods. Certain goods can be substituted with related goods, therefore shifting their demand curve. These goods are called substitutes. (ex. frozen yogurt and ice cream, or sweaters and hoodies)
Certain goods also incentivize the purchasing of another good that essentially pairs well with one another. These goods are called compliments. (ex. hot fudge and sprinkles - icecream, peanut butter - jelly)
Tastes
Tastes determine demand for any good. Peoples tastes are determined by historical and psychological factors.
Expectations
Demand can also be determined and changed by peoples expectations. When people expect or don’t expect certain things they will spend less or more. (ex. knowing you’ll have a higher paycheque next month can adjust spending habits and therefore shift the demand curve)
Number of Buyers
The higher the number of buyers in a certain market (buying a specific good or service) the higher the demand. (simple math)
Shifts in Demand Curve
All changes besides a price change are factors that shift the demand curve.
Quantity Supplied
The amount that a seller is willing and able to sell
Law of Supply
When the price of a good or service increases, sellers will sell more of it to make more profit.
Supply Schedule
a table showing the relationship between price and quantity supplied
Supply Curve
Slopes upward because the higher the price, the more supplied.
Input Prices (Supply Shifts)
When the price of an input (ingredients, equipment, labour) increases, profit decreases. (Shift left)
Technology (Supply Shift)
Technology can make production less expensive and more efficient, so quantity supplied would increase. (Shift right)
Expectations (Supply Shift)
Certain expectations of the future affect the supply curve. Expectations of an increase in price and decrease in price affect the curve. (Shift right or left)
Number of Sellers
The number of sellers and therefore products affects the quantity supplied.
Market Equilibrium
This is the point where the supply curve and demand curve intersect (equilibrium price and quantity)
Market-Clearing Price
the equilibrium price, because at this price everyone in the market is satisfied.
Surplus (of a good)
A surplus means that sellers ares selling a good for a price that buyers are not willing or able to pay, and now sellers are stuck with an excessive amount of their good. This is solved by reducing the price of the good, bringing it to the equilibrium price.
Quantity supplied is exceeding quantity demanded.
Shortage (of a good)
A shortage occurs when the price of a good is lower than the equilibrium. Essentially there is not enough pf the good for everyone.
Quantity supplied is lower than quantity of demand.
Surplus and Shortage Causes
Surplus
- Technological advancements
- Price floors (government-set price, could be above equilibrium)
Shortage
- natural disasters
- price control (government-set price, could be below equilibrium)
Steps to Effects on Equilibrium
- Decide wether the event is shifting the supply curve, demand curve, or both
- Decide wether the shift is to the right or left
- Look at how the change affected the equilibrium price and quantity
Shifts versus Movement
If the quantity supplied stays the same despite increase in demand, that is a shift in the supply curve. But, if a firm raises prices in response to the increasing demand then it becomes a shift in the supply curve and a movement along the supply curve.
Supply and Demand, Quantity Supplied and Demanded
Supply and Demand refer to the overall supply and demand curves.
Quantity Supplied and Demand refer to specific points on the curves.