Simplifying Assumption in Lending Models: Borrowing without Initial Wealth
Basic economic models of borrowing and lending often start with the simplifying assumption that individuals can secure loans regardless of their initial wealth. This premise sets aside the real-world constraint where a lack of assets can be a significant barrier to accessing credit, allowing the model to focus on other aspects of the borrowing decision.
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Introduction to Microeconomics Course
The Economy 2.0 Microeconomics @ CORE Econ
Ch.9 Lenders and borrowers and differences in wealth - The Economy 2.0 Microeconomics @ CORE Econ
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Simplifying Assumption in Lending Models: Exogenous Interest Rate
Simplifying Assumption in Lending Models: Access to Credit without Wealth
Consider an individual's decision between 'consumption now' and 'consumption later'. Their initial situation before any financial transaction is represented by an endowment point. They can choose any combination of consumption now and later along a downward-sloping feasible frontier that passes through this endowment point. If this individual's optimal choice results in a level of 'consumption now' that is greater than their initial endowment for 'consumption now', which of the following statements must be true?
Comparing Intertemporal Choices
Analyzing the Impact of an Interest Rate Change on a Borrower
An individual is deciding how much to consume now versus in the future. In the graphical model representing this choice, the slope of the line representing all possible consumption combinations they can achieve through borrowing or lending is determined by their personal degree of patience.
An individual is deciding how to allocate their consumption between the present and the future. Their options are represented by a downward-sloping feasible frontier, and their preferences are represented by indifference curves. At their current consumption plan, which is a point on the feasible frontier, they are willing to give up 1.05 units of future consumption to gain 1 unit of present consumption. The market allows them to exchange 1 unit of present consumption for 1.10 units of future consumption by saving. To reach a higher level of satisfaction, what should this individual do?
The Graphical Determination of Borrowing and Lending
An individual makes a choice between consumption today and consumption in the future, constrained by their initial resources and the market interest rate. Match each economic description below to the corresponding feature of the graphical model that represents this choice.
Inferring Preferences from Intertemporal Choice
Comparing Borrower and Saver Preferences
Assessing the Potential for a Loan
Interest Rate as the Price of Present Consumption
Applying the Constrained Choice Framework to Intertemporal Decisions
Figure 9.3: Comparing Julia's Feasible Frontiers at 10% and 78% Interest Rates
Simplifying Assumption in Lending Models: Borrowing without Initial Wealth
How Real Credit Markets Deviate from Simplified Models
Learn After
After a city government guarantees it will cover all financial losses for any new restaurant that fails within its first year, several new restaurant owners begin to take significant, unobservable risks with their business models, such as using overly expensive, low-demand ingredients. This change in behavior, driven by the financial safety net, is a classic example of a(n) ____ problem.
Model Prediction vs. Real-World Borrowing
A basic economic model predicts that a rational individual with high expected future earnings but no current savings will choose to borrow a large sum for a valuable investment today. However, in practice, this individual is often unable to secure the loan. What is the most likely reason for this discrepancy between the model's prediction and the real-world outcome?
The assumption that individuals can borrow without initial wealth makes basic lending models entirely useless for understanding any real-world borrowing behavior.
Evaluating a Core Assumption in Borrowing Models
The Rationale for Simplifying Assumptions in Economic Models
In a standard intertemporal choice model, an individual has no wealth today but is guaranteed a large income in the future. If we introduce the real-world constraint that lenders often require collateral (initial wealth) to issue a loan, which component of the individual's decision-making model is most directly and immediately restricted?
Critiquing a Simple Lending Model
An economic advisor uses a standard model to argue that a new government program offering free business plan workshops will significantly boost new business creation. The model assumes individuals can borrow against their expected future profits. A critic argues the program will have little effect on aspiring entrepreneurs from low-wealth backgrounds. What is the most likely foundation for the critic's argument?
Evaluating Entrepreneurship Policies
The assumption that individuals can borrow without initial wealth makes basic lending models entirely useless for understanding any real-world borrowing behavior.