U.S. Inflation Across Decades [OC]

Posted by forensiceconomics

8 comments
  1. Using **FRED CPI data** ([source](https://fred.stlouisfed.org/seriesBeta/CPIAUCSL)) and **ggplot2** in R, we visualized inflation trends across time. The results?
    ✅ **1970s & 1980s had the highest inflation volatility** 📈
    ✅ **1990s & 2000s saw relative stability** 🔄
    ✅ **The 2020s have seen a sharp spike, but not the worst in history**

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  2. 1960s is best case scenario — not too restricted but still avoiding outlier periods.

  3. Something seems off. In the 1980s for example, you have 10 total years and more than 5 outliers. That’s fundamentally impossible. Your median (horizontal bar in your box plot) has to have 5 yearly inflation rates above and below it and your plot shows not that.

  4. Does this use the post-1980’s method of calculating CPI or is it a mixture of different methodologies?

  5. Measuring inflation is like trying to measure global warming, but we can’t decide on the definition of temperature, so we create a committee comprised of a few scientists and several politicians to “update” the definition every few years.

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