_f w2_or_sc_nz_30
_m w2_or_sc_nz_30
_f w2_pos_30
_m w2_pos_30
_f w2_nonemp
_m w2_nonemp
_f coll1823
_m coll1823
_f kid_indv_rank_26
_m kid_indv_rank_26
_f kid_indv_rank_30
_m kid_indv_rank_30
_f kid_rank_30
_m kid_rank_30
_f w2wages_30
_m w2wages_30