Using data from the 1982 National Center for Research in Vocational Ed
ucation employer survey, the author finds evidence strongly supporting
the hypothesis that employment probation induces self-selection by wo
rkers. Those who accepted jobs with probationary employment tended to
be more efficient workers and less likely to quit than those who took
jobs without probation. The author hypothesizes that workers who fear
they will not last through the probationary period, either because the
y are not sure their performance will be adequate or they think they m
ay quit, will not apply for jobs wi th probation, whereas those who ar
e more confident that their work will be acceptable and that they will
not quit will apply for such jobs in order to obtain the higher wages
that commonly attach to jobs with probation.