add numbering

HumphreyYang · HumphreyYang · commit c4265bd0f91a · 2023-02-06T22:52:27.000+11:00
diff --git a/lectures/_toc.yml b/lectures/_toc.yml
@@ -15,6 +15,7 @@ parts:
   - file: linear_equations
   - file: lln_clt
 - caption: Introductory Economics
+  numbered: true
   chapters:
   - file: inequality
 - caption: Models
