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Two Mechanisms for Disrupting Equilibrium in the PDC Model
In the Price Dynamics Curve (PDC) model, a market equilibrium can be disrupted in two distinct ways. The first is a 'price shock,' an external event that causes a price change and results in movement along a static PDC. The second is a 'PDC shift,' a fundamental change in market conditions that alters the position of the entire curve.
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Introduction to Macroeconomics Course
Ch.8 Economic dynamics: Financial and environmental crises - The Economy 2.0 Macroeconomics @ CORE Econ
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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Analyzing a Market Disruption
Consider two separate events affecting the market for a specific agricultural commodity:
- A widely-publicized, but temporary, health scare leads to a sudden drop in consumer demand and a corresponding fall in the market price. The underlying production costs and long-term consumer preferences remain unchanged.
- The government introduces a new, permanent subsidy for producers of the commodity, which lowers their effective production costs at every level of output.
How would these two events be represented differently in a dynamic model that plots the price level against its rate of change?
Differentiating Market Disruptions
In a dynamic model representing the market for a specific good, the relationship between the current price and its rate of change is initially stable. Suddenly, analysts observe that for any given price, the rate at which the price is expected to change in the future has systematically increased. Which of the following events is the most likely cause of this specific disruption?