AGE
AGE2
AGRIC
EDUC
EXP2
EXPERIENCE
HAVE_JOB1
INDUS
LHWORKA
LNWAGE
M_STAT1
OWN3
SERVICES
SK1
SK2
SK3
SK4
psmatch2: Propensity Score
psmatch2: Treatment assignment
psmatch2: Common support
psmatch2: weight of matched controls
psmatch2: value of lnwage of match(es)
psmatch2: Identifier (ID)
psmatch2: ID of nearest neighbor nr. 1
psmatch2: # matched neighbors
psmatch2: abs(pscore - pscore[nearest neighbor])
nonselection hazard