theorem threshold_ratio_invariant {delta gamma s1 s2 : ℝ}
(_hg : 0 < gamma) (hs1 : 0 < s1) (hs2 : 0 < s2)
(hdelta : 0 < delta) :
dollarizationThreshold delta gamma s1 /
dollarizationThreshold delta gamma s2 = s2 / s1 := by
unfold dollarizationThreshold
have hd : delta ≠ 0 := ne_of_gt hdelta
field_simpPaper 7: Settlement Feedback and Monetary Policy in a Mesh Economy