reduce grid size for faster run

HumphreyYang · HumphreyYang · commit 5dd1ce1aa861 · 2026-04-10T16:37:01.000+10:00
diff --git a/lectures/dovis_accounting_mf.md b/lectures/dovis_accounting_mf.md
@@ -813,8 +813,8 @@ def create_model(
     α_l=0.005,
     α=0.99,
     ξ_bar=0.5,
-    n_B=120,
-    n_φ=80,
+    n_B=40,
+    n_φ=40,
     n_ξ=9,
     B_max=20.0,
 ):
