Cups of coffee and donuts are complements. Both have inelastic demand. A hurricane destroys half

Cups of coffee and donuts are complements. Both have...

Key Concepts

Supply Shock

A supply shock is an unexpected event that suddenly changes the supply of a product, leading to changes in its market price and quantity. In economic analysis, supply shocks are represented in supply and demand diagrams as a leftward (or rightward) shift of the supply curve. Understanding supply shocks is crucial because they help explain how disruptions in production, such as a natural disaster affecting a key input, can lead to significant changes in market outcomes.

Inelastic Demand

Inelastic demand refers to a situation where the quantity demanded of a product changes very little in response to changes in its price. This concept is critical in understanding total expenditure effects because, with inelastic demand, a price increase results in a higher total expenditure despite the small change in quantity demanded. It emphasizes the importance of price changes on revenue generation for goods that consumers perceive as necessities or have few substitutes.

Complementary Goods

Complementary goods are products that are often used together, so that a change in the market for one affects the demand for the other. When the price or availability of one complementary good is affected, there is a corresponding impact on the consumption of the other. This relationship is central in multi-product markets where the demand for one product is dependent on the conditions of its complement, leading to intertwined market outcomes.

Supply and Demand Diagrams

Supply and demand diagrams are graphical representations used to analyze how different factors, such as supply shocks and changes in demand elasticity, affect market equilibrium. These diagrams effectively illustrate the shifts in supply and demand curves, the resulting equilibrium price and quantity changes, and the overall impact on market outcomes. They are essential tools in microeconomics for visualizing the effects of market events and policy changes.

Total Expenditure Analysis

Total expenditure analysis examines the total amount spent on a product, which is calculated as the product of its price and the quantity sold. This concept is key to understanding the consumer’s and producer’s side of market changes, especially when demand is inelastic. It also plays a crucial role in analyzing the welfare implications of price changes and how shifts due to supply or demand affect overall spending in the market.

Transcript

00:01 Here we're working with market forces and how the supply and demand of compliments in this case are affected by inelastic demand and increases in price.

00:10 So here we're taking a look at coffee and donuts.

00:13 These are two goods and we know that these are compliments of one another and they each have inelastic demand.

00:19 Now suppose that half of the coffee bean crop is destroyed, say in a hurricane, right? so we lose half of this coffee bean crop.

00:26 We want to know what happens to the price of coffee beans.

00:30 Because this coffee bean crop is destroyed, we're going to end up with lower supply, right? our supply is going to be reduced by half.

00:38 So we can see that our supply curve is going to shift inward like this.

00:44 So here's our new supply curve.

00:46 We'll denote that as s1.

00:48 And what we can see is that our price used to sit right in here.

00:54 But now that our supply curve has shifted, our new equilibrium price has moved upwards.

00:58 So our price zero here and our new price piece piece.

01:02 Has increased.

01:03 So we see that our price has gone up.

01:08 Now with the same example, let's move forward and ask ourselves what would happen to the price of a cup of coffee? well, we know that coffee beans are obviously an input into producing a cup of coffee.

01:22 So because that supply has reduced in our coffee beans, we know that our supply of cups of coffee is also going to be reduced.

01:30 We can't make as many cups of coffee if we only have half the amount of coffee beans to make it.

01:36 So our supply curve is going to shift again.

01:39 And we see once again that when our price sat here at p0, our new equilibrium price has shifted upward to p1.

01:47 So again, our price of a cup of coffee has increased...

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