I feel like Popper never quite understood the historicist. This seems evidenced by the quotes you provide are all rather him talking about rather quantative things. "Historicism" is more concerned with big picture stuff and is actually rather apophatic and in some cases self consciously post-hoc in it's approach. Whereas economists tend to not worry about big picture as say Hegel or Marx would, but more concerned in predicting short term which I think lachmann and poppers criticisms apply very well, but they don't therefore translates into a critique of historicism.
I feel like Popper never quite understood the historicist. This seems evidenced by the quotes you provide are all rather him talking about rather quantative things. "Historicism" is more concerned with big picture stuff and is actually rather apophatic and in some cases self consciously post-hoc in it's approach. Whereas economists tend to not worry about big picture as say Hegel or Marx would, but more concerned in predicting short term which I think lachmann and poppers criticisms apply very well, but they don't therefore translates into a critique of historicism.
It would seem that Armstong's computer program, Socrates, and it’s apparent accuracy speaks to the issue you address