Inflation β Purchasing Power Over Time
Audience: High SchoolCategory: Economics
Description
Illustrates how inflation erodes purchasing power over time through multiple visual metaphors: a shrinking coin, a bar chart showing how many goods $100 buys across decades, the rising CPI index, and the Rule of 72 applied to purchasing power halving at 3% annual inflation (~24 years).
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Inflation β Purchasing Power Over Time
Description
Illustrates how inflation erodes purchasing power over time through multiple visual metaphors: a shrinking coin, a bar chart showing how many goods $100 buys across decades, the rising CPI index, and the Rule of 72 applied to purchasing power halving at 3% annual inflation (~24 years).
Phases
| # | Phase Name | Duration | Description |
|---|---|---|---|
| 1 | Title & Hook | 5s | Title appears, brief explanation of inflation concept |
| 2 | Shrinking Coin | 8s | A coin (circle with $ symbol) visibly shrinks to represent eroding real value |
| 3 | Bar Chart | 10s | Bar chart: goods purchasable with $100 in 1970, 1990, 2010, 2024 β bars decrease |
| 4 | CPI Index | 8s | Line plot of the Consumer Price Index rising from 1970 to 2024 |
| 5 | Formula | 5s | Display Real Value = Nominal Value / Price Index formula |
| 6 | Rule of 72 | 8s | At 3% inflation, purchasing power halves in 72/3 = 24 years. Visual demonstration. |
Layout
+-----------------------------------------------+
| Inflation β Purchasing Power Over Time |
| |
| [Coin shrinks] [Bar chart: goods per $100]|
| 1970: ββββββββββββ 100 |
| 1990: ββββββββ 70 |
| 2010: ββββ 40 |
| 2024: ββ 20 |
| |
| CPI: ^ _______/ |
| | ___/ |
| | ___/ |
| +--1970--1990--2010--2024--> |
| |
| Real Value = Nominal / Price Index |
+-----------------------------------------------+
Area Descriptions
- Top: Title
- Left-center: Animated shrinking coin phase
- Right-center: Bar chart showing declining purchasing power
- Lower-center: CPI line chart
- Bottom: Formula and Rule of 72 text
Assets & Dependencies
- Fonts: LaTeX / sans-serif
- Manim version: ManimCE 0.19.1
Notes
- Coin: gold circle with dollar sign, shrinks via animate.scale()
- Bars: orange/red tones, decreasing in height
- CPI line: blue, rising
- Background: dark navy #1a1a2e
- Rule of 72 text uses MathTex