The image is from a Washington Post article which took the data from an interesting research paper titled Who Pays For Your Rewards? Redistribution in the Credit Card Market.

The research paper is a good read. (A free PDF of the whole paper is available at the link.) It examines how the use of rewards credit cards results in a massive wealth transfer from low-credit-score customers to high-credit-score customers:

We estimate an aggregate annual redistribution of $15 billion from less to more educated, poorer to richer, and high to low minority areas, widening existing disparities.

The Washington Post article attempts to frame the clear north-south split as a result of healthcare issues in This map looks too similar to maps of poverty and education, and we know health correlates strongly with both of those issues.

  • RaoulDook@lemmy.world
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    1 month ago

    Pretty much a map of poverty levels and areas where minorities are concentrated, not surprising.

  • merthyr1831@lemmy.ml
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    1 month ago

    I’m sure nothing can be inferred from the dark blue region that follows the rust belt exactly

    • Plagiatus@lemmy.world
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      1 month ago

      Maybe they’re more color-blind friendly than the typical red-green scale? Idk, it’s just a guess as to why these colors were chosen.

        • gcheliotis@lemmy.world
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          1 month ago

          How about red and blue, would that look good to you? Because I make lots of data graphs and I often go for red and blue. Sometimes red and green I must admit. But mostly red and blue when using a two color scale.

          • Baggins [he/him]@lemmy.ca
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            1 month ago

            So most of the time I struggle to identify purple as a colour that is distinct from blue. I think the biggest thing to help anyone see it would be the contrast in values, ie use a light bright red and a deep dark blue as the extreme values so that even someone with monochrome vision could see the difference. This is all just a guess though, when I struggle the most is with dark and desaturated colours where there just isn’t a ton of information. With bright colours in good lighting telling purple from blue or bright green from yellow gets a lot easier.

            Eta: there are a bunch of colour blind filters you can do on the computer, you could run your images through those to see what looks best

            • gcheliotis@lemmy.world
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              1 month ago

              Thanks for your insights! I am not aware of people having monochrome vision though, is that a thing? I use a single-color scale when that is appropriate. But use blue and red often for positive and negative values respectively. No purple. Just shades of blue and shades of red.

      • jaybone@lemmy.world
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        1 month ago

        For fully color blind people I wished they could just do black to white with shades of gray in between.

        • lemming@sh.itjust.works
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          1 month ago

          There are colour scales that combine colours and intensities consistently, so that if you discard (or can’t percieve) colour information, you still get a nice black to white scale. For a moment, I though the map used cviridis scale, which has this property and is designed to look as similar as possible to people with various variants of colour blindness. But then I realised that the scale used here has the brightest point in the middle, not on one side.

    • SynopsisTantilize@lemm.ee
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      1 month ago

      Yea who the fuck designed this color scheme. And the data points being so…random? Why not go by 50 or 100…

      • Ptsf@lemmy.world
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        1 month ago

        Could be a choice to reflect the distribution of different scores. I can’t imagine credit scores are a very linear distribution.

        • MutilationWave@lemmy.world
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          1 month ago

          It also doesn’t go low and high enough. The first and last category should show everything below and everything above respectively.

          I mean a 687 credit score isn’t ideal but it’s far from how bad it can get.

          • morphballganon@lemmynsfw.com
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            1 month ago

            It’s showing averages. Just because certain scores are possible for an individual doesn’t mean there’s a district somewhere with that average score.

            My credit score is not shown here because there is no district with that average score.