Tom's May 29 addition of a new lecture ak2.md

Author: thomassargent30

lectures/_toc.yml

@@ -55,7 +55,7 @@ parts:
   - file: money_inflation_nonlinear
   - file: laffer_adaptive
   #- file: french_rev
-  #- file: ak2
+  - file: ak2
 - caption: Stochastic Dynamics
   numbered: true
   chapters: