Simplifying Assumption in Lending Models: Access to Credit without Wealth
A third simplification used in introductory models of borrowing is the premise that individuals can obtain loans even if they possess no initial wealth. This assumption enables the model to focus squarely on the temporal shifting of consumption, abstracting away from the real-world complication of credit constraints that are often tied to a borrower's existing assets.
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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
Model Simplification vs. Real-World Lending
A simple economic model of borrowing predicts that an individual will choose to borrow an amount that perfectly smooths their consumption between the present and the future. However, in reality, individuals with no savings or assets often cannot borrow this predicted amount, even if they have strong future earning potential. What is the most likely reason for this discrepancy?
A simple economic model that assumes individuals can borrow without any initial wealth is fundamentally flawed and provides no useful insights into real-world borrowing decisions.
Rationale for Simplifying Assumptions in Economic Models
Evaluating a Core Assumption in Borrowing Models
In an economic model of borrowing, what is the primary analytical benefit of assuming that an individual can secure a loan without possessing any initial assets?
In a standard model of intertemporal choice, an individual's feasible consumption frontier shows all possible combinations of consumption today and consumption in the future. Consider an individual with no wealth today but a guaranteed income in the future. If the model's simplifying assumption that anyone can borrow is removed, and instead, borrowing is only possible for those with existing wealth, how does this change this specific individual's set of possible consumption choices?
Limitations of a Simplified Borrowing Model
A simple economic model of borrowing makes certain assumptions to isolate key behaviors. Match each component of this modeling approach to its correct description.
Calculating Maximum Consumption in a Simplified Model
A simple economic model that assumes individuals can borrow without any initial wealth is fundamentally flawed and provides no useful insights into real-world borrowing decisions.