Phillips Curve & Long-Run Adjustment

📉 The Phillips Curve

Part 1 of 7 — Inflation-Unemployment Tradeoff

🔑 Key Concept: The Phillips Curve shows the inverse relationship between inflation and unemployment in the short run. In the long run, the Phillips Curve is vertical at the natural rate of unemployment (NRU). The AP exam heavily tests this graph and its relationship to the AD-AS model.

📖 Short-Run Phillips Curve (SRPC)

The Tradeoff

In the short run, there is an inverse (negative) relationship between inflation and unemployment:

• Lower unemployment → Higher inflation (economy overheating; too much demand)
• Higher unemployment → Lower inflation (economy slowing; insufficient demand)

Connection to AD-AS

Key Insight

• Movement ALONG the SRPC = changes in aggregate demand (AD shifts)
• Shift of the SRPC = changes in aggregate supply (SRAS shifts) or changes in inflation expectations

What Shifts the SRPC?

🔑 AP Connection: The most common mistake is confusing a MOVEMENT along the SRPC (AD change) with a SHIFT of the SRPC (supply shock or expectations change). The AP exam tests this distinction every year.

Concept Check 🎯

📖 Long-Run Phillips Curve (LRPC)

The LRPC Is Vertical at the Natural Rate of Unemployment (NRU)

In the long run, there is NO tradeoff between inflation and unemployment. The economy gravitates to the NRU regardless of the inflation rate.

Why?

• In the long run, workers and firms adjust expectations to match actual inflation
• If the government tries to keep unemployment permanently below the NRU by stimulating demand:
  1. Initially: unemployment falls, inflation rises (move along SRPC)
  2. Workers notice higher prices → demand higher wages
  3. Higher wages → firms' costs rise → they reduce hiring
  4. Unemployment returns to NRU, but now at a higher inflation rate
  5. The SRPC shifts up to reflect new, higher inflation expectations

Stagflation

• Stagflation = high inflation + high unemployment simultaneously
• Caused by a negative supply shock (e.g., 1970s oil crisis)
• SRPC shifts RIGHT → both inflation and unemployment increase
• Regular fiscal and monetary policy can't fix both problems at once:
  • Expansionary policy → reduces unemployment but worsens inflation
  • Contractionary policy → reduces inflation but worsens unemployment

🔑 AP Connection: The LRPC being vertical at NRU means that in the long run, attempts to keep unemployment permanently below the natural rate will only produce accelerating inflation without lasting employment gains. This is tested in the FRQ regularly.

Check Your Understanding 🎯

📈 The Phillips Curve

Part 2 of 7 — Key Processes

Understanding the processes related to The Phillips Curve helps explain how and why patterns develop. This part explores the mechanisms driving key phenomena.

Key Concepts

Concept Check 🎯

Key Processes — Deeper Dive

Process 1

The primary mechanism that drives patterns in The Phillips Curve. Understanding this concept is essential for mastering The Phillips Curve in AP Macroeconomics.

Process 2

A secondary process that shapes outcomes in The Phillips Curve. This builds on the previous concept and connects to broader themes in the course.

Cause and effect

The relationship between actions and outcomes in The Phillips Curve. This is frequently tested on the AP exam and connects to multiple units in the curriculum.

Applied Recall (exact term answers) ✍️

1. What term refers to the primary mechanism that drives patterns in The Phillips Curve?

📈 The Phillips Curve

Part 3 of 7 — Patterns & Examples

This part examines specific patterns and real-world examples related to The Phillips Curve. Case studies help illustrate abstract concepts.

Key Concepts

Concept Check 🎯

Patterns & Examples — Deeper Dive

Spatial pattern

The geographic distribution related to The Phillips Curve. Understanding this concept is essential for mastering The Phillips Curve in AP Macroeconomics.

Case study

A specific real-world example that illustrates The Phillips Curve. This builds on the previous concept and connects to broader themes in the course.

Comparison

Analyzing similarities and differences across examples of The Phillips Curve. This is frequently tested on the AP exam and connects to multiple units in the curriculum.

Applied Recall (exact term answers) ✍️

1. What term refers to the geographic distribution related to The Phillips Curve?

📈 The Phillips Curve

Part 4 of 7 — Connections & Interactions

The Phillips Curve connects to other topics in AP Macroeconomics. Understanding these connections reveals how different processes interact.

Key Concepts

Concept Check 🎯

Connections & Interactions — Deeper Dive

Interconnection

How The Phillips Curve links to other course topics. Understanding this concept is essential for mastering The Phillips Curve in AP Macroeconomics.

Scale interaction

How The Phillips Curve operates differently at local, national, and global scales. This builds on the previous concept and connects to broader themes in the course.

Feedback loop

How outcomes of The Phillips Curve can reinforce or modify the original process. This is frequently tested on the AP exam and connects to multiple units in the curriculum.

Applied Recall (exact term answers) ✍️

1. What term refers to how The Phillips Curve links to other course topics?

📈 The Phillips Curve

Part 5 of 7 — Change Over Time

The Phillips Curve has evolved over time. Understanding historical and contemporary changes helps explain current patterns and predict future trends.

Key Concepts

Concept Check 🎯

Change Over Time — Deeper Dive

Continuity

Aspects of The Phillips Curve that have remained stable over time. Understanding this concept is essential for mastering The Phillips Curve in AP Macroeconomics.

Change

How The Phillips Curve has transformed due to new forces and conditions. This builds on the previous concept and connects to broader themes in the course.

Trend

The direction of change in The Phillips Curve over time. This is frequently tested on the AP exam and connects to multiple units in the curriculum.

Applied Recall (exact term answers) ✍️

1. What term refers to aspects of The Phillips Curve that have remained stable over time?

2. What concept describes how The Phillips Curve has transformed due to new forces and conditions?

📈 The Phillips Curve

Part 6 of 7 — Problem-Solving Workshop

Apply The Phillips Curve concepts to data interpretation and analytical scenarios. Practice the types of questions seen on the AP exam.

Key Concepts

Concept Check 🎯

Problem-Solving Workshop — Deeper Dive

Data interpretation

Analyzing maps, graphs, and tables related to The Phillips Curve. Understanding this concept is essential for mastering The Phillips Curve in AP Macroeconomics.

Argumentation

Making evidence-based claims about The Phillips Curve. This builds on the previous concept and connects to broader themes in the course.

Spatial reasoning

Using geographic thinking to analyze The Phillips Curve. This is frequently tested on the AP exam and connects to multiple units in the curriculum.

Applied Recall (exact term answers) ✍️

1. What term refers to analyzing maps, graphs, and tables related to The Phillips Curve?

📈 The Phillips Curve

Part 7 of 7 — AP Review

Comprehensive review of The Phillips Curve for the AP exam. Focus on key concepts, common question types, and exam strategies.

Key Concepts

Concept Check 🎯

AP Review — Deeper Dive

Key vocabulary

Essential terms and definitions for The Phillips Curve. Understanding this concept is essential for mastering The Phillips Curve in AP Macroeconomics.

Common question types

The most frequent ways The Phillips Curve is tested on the AP exam. This builds on the previous concept and connects to broader themes in the course.

Exam strategy

Approaches for answering The Phillips Curve questions effectively. This is frequently tested on the AP exam and connects to multiple units in the curriculum.

Applied Recall (exact term answers) ✍️

1. What term refers to essential terms and definitions for The Phillips Curve?

2. What concept describes the most frequent ways The Phillips Curve is tested on the AP exam?