
Median income can hide big differences in cost of living, household size, and local prices, so the same median number can mean very different real purchasing power in different places. It also collapses the whole distribution into one value, so it won’t tell you whether a community has lots of people clustered near the median or a “hollowed-out” middle with many people far below it.
Imagine a set of 11 earners. 5 earn $20 a year. 5 earn $10B a year. One earns $50k a year. The median is $50k. Imagine a different set of 11. 5 earn $49k. 5 earn $51k. 1 earns 50k. The median is still $50k. Those both represent vastly different scenarios but project the same representative figure. It’s a curated statistic to conceal reality and misrepresent the economic state of the country.
Your question highlights the real issue. There isn’t a single metric for it. People want it to be simple because they can’t understand complex things. Disposable income per capita is useful. Real median over time is useful. PCE index is useful. Cost of Living. Regional Price Parity. CPI. Stop looking for one-stop answers because that is surface-level nonsense for surface-level thinkers.
Do you understand what is implied by “faster than inflation”? Talk about not understanding basic terminology. It’s absolutely useful on its own. Thats not to say that one metric gives you a complete picture, for a full understanding you should look at an array of metrics, but median income still tells you what the “typical” household is actually taking home. Unlike average income, it isn’t pulled upward by a small number of ultra-high earners, so it tracks broad living standards more honestly.
Your inability to understand context is astounding. You asked how a national time-series statistic compares to purchasing power. Of course it varies by location, but that’s irrelevant to a national conversation. It doesn’t make sense to compare real disposable income per capita nationally with the purchasing power of a dollar in Albuquerque if we’re evaluating the country as a whole.
It isn’t a useful figure in isolation. You’re the dumbass who thinks it is. 😂 It’s cute that you think your intro class is really empowering you to understand things. Let me know when you start getting articles published in journals. Protip, though, you’re going to want to be able to understand the things I said before you take on that challenge, though.
You clearly don’t understand the things you said yourself. If you did, you wouldn’t ask nonsensical questions like "How does real disposable income over time compare to purchasing power over time?" Let’s be clear, your original claim was that it was straight up not a useful figure. You didn’t pivot to the “in isolation” qualifier until I pressed you. Even then you’re still wrong. It won’t give you a complete understanding on its own, but it absolutely communicates important information.