Via JKH in the comments:
“Paul Krugman does:
S = I + (S – I)
The blue line = S
The red line = I
The gap between the blue line and the red line = (S – I)
Oh, yeah … and I’m pretty sure he knows what the definition of saving is.
Anybody ever see a neat graph like this in MMT land?
I.e. one that actually includes I?”