Calling all chart geeks!
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I am looking for charts that look like this:

I can think of three charts where two lines, basically parallel, diverged in the mid-70s, and one started growing exponentially, and the other stayed flat.
One that everybody knows is income growth by percentile; another is flat wage income vs. exponentially growing non-wage income; a third is life expectancy for the waged (flat) vs. the non-waged (increasing). All three charts have a similar shape, and in each case the divergence started in the mid-70s.
Too lazy and too late to find them, but I'm sure you've all seen them.
But I think there are a ton of other examples, but whenever I see one, I think, "Oh, I'll remember that one" and of course I never do. So, readers?
NOTE Could be anything. Doesn't have to be financial. Just the two curves, diverging starting in the mid-70s.

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Comments
gmta
i've been thinking back to the mid-70s too and wondering which charts to marshall in support of what is still at this moment just a nebulous postualte rolling around in far corners of my brain. since it appears you are about to do at least some of my work for me, i will provide you links to all the charts i can think of.
first one (i'm going to have to go looking for the others), productivity v real median family income:
http://stateofworkingamerica.org/charts/...
saez and piketty 1
top incomes in the long run of history: http://elsa.berkeley.edu/~saez/atkinson-...
more saez and piketty
probably all the charts in these links can be found in the earlier link, but here goes:
http://www.nationalreview.com/agenda/296...
and
http://www.voxeu.org/article/taxing-1-wh...
and
http://www.cbpp.org/cms/index.cfm?fa=vie...
and
http://elsa.berkeley.edu/~saez/
health care spending
http://www.ianwelsh.net/hard-and-complic...
and
http://hipparchia-moonlighting.blogspot....
i see you already have this one
http://www.correntewire.com/only_chart_y...
you also have floating around in one of your posts here that chart of income by quintile iirc but i can't think of any good serch terms yet
I believe it is here
http://www.correntewire.com/obama_stump_...
I threw maximum cynicism into that one (2007). It holds up pretty well, with the exception that I wasn't nearly cynical enough.
yes, that one!
also, thanks for reminding me of that post.
federal minimum wage
nominal v real values
http://oregonstate.edu/instruct/anth484/...
speaking of which, gotta go out and do some paying work for a few hours. bbl.
That Ian Welsh chart is really interesting...
... because although the shape fits the description, it shows two possible futures and the path we took.
there are some other versions
there are some other versions of that chart floating around the interwebz, showing more countries, but that's the only one i remember the location of. if i find any of the others, i'll post a link.