E4P - L1 - Lesson 2

What does the marginal principle help you decide?

• How to make large decisions

• How to break decisions into smaller parts

• How to avoid decisions

• How to make decisions quickly

Answer explanation

The marginal principle helps you break decisions into smaller parts, allowing for a more manageable analysis of each component, rather than making large decisions all at once.

When should you buy an additional unit according to the marginal principle?

• When the marginal cost is higher

• When the marginal benefit exceeds the marginal cost

• When the marginal benefit is lower

• When the marginal cost equals zero

Answer explanation

You should buy an additional unit when the marginal benefit exceeds the marginal cost. This means the additional value gained from the unit is greater than the cost incurred, leading to a net gain.

What should you do as long as the marginal benefit is at least as large as the marginal cost?

• Stop buying

• Continue to buy additional units

• Sell all units

• Reduce the price

Answer explanation

As long as the marginal benefit exceeds or equals the marginal cost, it is rational to continue purchasing additional units. This maximizes utility and ensures that resources are used efficiently.

When should you stop buying according to the marginal principle?

• When the marginal benefit is less than the marginal cost

• When the marginal benefit equals the marginal cost

• When the marginal cost is zero

• When the marginal benefit is double the cost

Answer explanation

You should stop buying when the marginal benefit equals the marginal cost. This is the point where the additional benefit of purchasing one more unit is exactly balanced by the cost, maximizing efficiency.

When is economic surplus maximized?

• When marginal cost is higher

• When marginal benefit is lower

• When marginal benefit equals marginal cost

• When marginal cost is zero

Answer explanation

Economic surplus is maximized when marginal benefit equals marginal cost. This condition ensures that resources are allocated efficiently, as any additional production would not increase overall welfare.

What does the interdependence principle say your best choice depends on?

• Your other choices

• The weather

• Your favorite color

• Your pet's name

Answer explanation

The interdependence principle states that your best choice is influenced by your other choices. This means that the context of your options matters, making 'Your other choices' the correct answer.

According to the interdependence principle, whose choices also affect your best choice?

• The choices others make

• Your friend's favorite food

• The color of your shoes

• The day of the week

Answer explanation

The interdependence principle states that your best choice is influenced by the choices others make. Therefore, the correct answer is 'The choices others make', as they directly impact your decision.

What is one of the factors that can change your best choice according to the interdependence principle?

• Developments in other markets

• The time you wake up

• Your favorite movie

• The number of pets you have

Answer explanation

Developments in other markets can influence your best choice by affecting supply, demand, and pricing, making it a key factor in decision-making according to the interdependence principle.

What does the interdependence principle say about expectations?

• Expectations about the future

• Expectations about the past

• Expectations about your lunch

• Expectations about your shoes

Answer explanation

The interdependence principle emphasizes that our expectations are often based on future outcomes rather than past events or unrelated matters. Thus, the correct choice is 'Expectations about the future'.

What happens when any of the factors in the interdependence principle change?

• Your best choice might change

• Your favorite song plays

• You get a new pet

• The sun sets

Answer explanation

When any factors in the interdependence principle change, it can affect your decision-making process, leading to a different best choice. This highlights the dynamic nature of preferences and choices.