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Extending the PDC Model with Curve Shifts
To better reflect the historical dynamics of housing markets, the S-shaped PDC model can be extended to include the possibility of the curve itself shifting. Instead of relying on a single price shock to move the market along a fixed curve, a shift in the entire PDC can alter the market's underlying structure, providing an alternative mechanism for triggering a boom or a bust.
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Introduction to Macroeconomics Course
Ch.8 Economic dynamics: Financial and environmental crises - The Economy 2.0 Macroeconomics @ CORE Econ
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Extending the PDC Model with Curve Shifts
Two Mechanisms for Disrupting Equilibrium in the PDC Model
Exogenous Factors in Economic Models
Consider a dynamic model representing a city's housing market, where the expected rate of price change is a function of the current price level. Two distinct events occur in this market:
Event A: The municipal government enacts a new zoning law that permanently increases the number of homes that can be built per acre, fundamentally altering the long-term supply potential at all price points.
Event B: A single, large apartment complex is unexpectedly sold to a foreign investor for a price significantly above the market average, causing a temporary, localized spike in the average price statistic for that month.
How would these two events be interpreted within the model's framework?
A dynamic model describes the relationship between the current price of a good and its expected rate of price change, represented by a curve. Match each economic event described below with its correct representation within this model's framework.
Analyzing Housing Market Dynamics
Modeling Market Changes
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Role of Future Price Expectations in Shifting the Price Dynamics Curve
Triggering a Housing Market Bust via a Downward PDC Shift
Imagine a housing market is described by an S-shaped curve that relates the current price of a house to its expected price in the next period. A major, long-term employer in the city unexpectedly announces it is shutting down, leading to widespread belief that property values will be lower in the future, regardless of their current price. How would this fundamental change in market sentiment be represented on the graph of the S-shaped curve?
Analyzing Housing Market Dynamics
Analyzing Market Dynamics
In a housing market model represented by a stable S-shaped curve relating current to future prices, a sudden, temporary increase in demand that raises the current price—without altering long-term expectations about the market's future—is represented by an upward shift of the entire curve.