How Real Credit Markets Deviate from Simplified Models
Actual credit markets diverge significantly from simplified economic models that assume guaranteed repayment and universally available credit. In reality, credit markets operate differently in three key ways: lenders actively set the interest rates, repayment of loans is not guaranteed due to default risk, and as a direct consequence of this risk, many would-be borrowers are either credit-constrained or excluded from the market entirely.
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CORE Econ
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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: Guaranteed Repayment
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
Credit Market Constrained
Credit Market Excluded
Figure 9.15: Indicators of Credit Market Exclusion and Constraints in the US (2019)
How Economists Learn from Facts: Evidence on Credit Market Limitations
Student Loans as a Distinguishing Feature of the US Credit Market
Assessing the Real-World Applicability of Credit Models
A simple economic model of borrowing assumes an individual can freely borrow or lend at a single market interest rate to choose their preferred mix of consumption now versus consumption later. Which of the following real-world situations represents the MOST significant deviation from this model's core assumptions?
Applying Economic Models to a Real-World Scenario
Simple economic models of borrowing and lending make several simplifying assumptions. Match each of the following real-world scenarios to the specific limitation of the simple model that it best illustrates.
A simplified economic model of borrowing assumes an individual can freely borrow any amount at a single market interest rate. According to this model's logic, if it accurately predicts the borrowing choices of a high-income individual, it must also accurately predict the choices of a low-income individual, since the basic trade-off between consuming now versus later is universal.
Model vs. Reality in Lending Decisions
A government analyst uses a simplified economic model which assumes that all individuals can borrow or lend any amount they wish at a single, fixed interest rate. Based on this model, the analyst concludes that a government-mandated, universally available low-interest rate loan will completely solve the problem of individuals being unable to afford major purchases. Which of the following statements provides the strongest critique of the analyst's conclusion by identifying a critical omission in the model?
Evaluating a Model's Prediction
The primary limitation of simple economic models of borrowing and lending is that they fail to account for individuals' irrational psychological biases when making consumption decisions over time.
Critiquing an Economic Policy Statement