move inflation_history to economic data

Author: mmcky

lectures/_toc.yml

@@ -10,6 +10,7 @@ parts:
   chapters:
   - file: long_run_growth
   - file: business_cycle
+  - file: inflation_history
   - file: inequality
 - caption: Essential Tools
   numbered: true
@@ -24,7 +25,6 @@ parts:
   - file: pv
   - file: cons_smooth
   - file: equalizing_difference
-  - file: inflation_history
   - file: cagan_ree
   - file: cagan_adaptive
   - file: geom_series