ENH: Use context managers
CLN: more usefull error message
CLN: remove unused parser tests
DATA: only drop on certain cols
add todo
DATA: fetch major_sectors and add bls tests
DATA updated notebook
BUG/ENH: set index on edu_bin before slicing

ENH: wrapper to make wage_index
API/ENH: construct_wage_index -> add_demo_dummies

ENH: add helper to run wage_index regression
CLN: Remove unused functions from helpers