关于虚拟变量设定和处理的问题

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关于borrowloan的设定是：当loan =1且borrow=1时，borrowloan=1；当loan =0且borrow=0时，borrowloan=0
但是这样设定下来，两者不全为1和不全为0情况生成的都是缺失值，删除缺失值的话这两种负债情况就缺失了
不删除的话  logit回归下来borrow 和borrowloan的系数都是0
这三个变量都是关于负债的，我是想研究不同负债情况下的影响，我不清楚虚拟变量borrowloan的设定是否需要进一步修改，或者在回归时有什么方法可以解决这个问题


* Example generated by -dataex-. To install: ssc install dataex
clear
input long hhid float(year loan borrow borrowloan)
2019013491 2019 1 0 .
2015012699 2019 0 0 0
2017033083 2017 0 0 0
2013005876 2019 0 0 0
2017038967 2019 0 1 .
2017030533 2017 0 0 0
2015030330 2019 0 0 0
2019010728 2019 0 0 0
2013016950 2019 0 0 0
2019001957 2019 0 0 0
2017000844 2017 0 0 0
2017037070 2017 0 1 .
2017009446 2017 1 0 .
2019026344 2019 0 0 0
2019025461 2019 0 1 .
2019030415 2019 0 1 .
2017024025 2017 0 0 0
2019018065 2019 0 0 0
2013025835 2019 0 0 0
2017009527 2017 0 0 0
2015026606 2019 0 0 0
2019031225 2019 0 1 .
2017023157 2017 1 0 .
2017010593 2017 0 0 0
2017029525 2017 0 0 0
2017008404 2017 0 0 0
2017019659 2019 0 0 0
2017029020 2017 0 0 0
2017016049 2017 0 0 0
2017002049 2019 0 0 0
2017025248 2019 0 0 0
2017018327 2017 0 0 0
2017033993 2017 1 0 .
2017020830 2019 1 0 .
2013018218 2019 0 0 0
2017018086 2017 1 0 .
2019031184 2019 0 0 0
2017012966 2017 0 0 0
2019017328 2019 0 0 0
2017003821 2017 0 0 0
2017033880 2017 0 0 0
2017034843 2017 0 0 0
2019023046 2019 0 0 0
2017037380 2017 0 0 0
2019032511 2019 0 1 .
2017001576 2017 0 0 0
2017007679 2017 0 0 0
2013011361 2019 0 0 0
2017001986 2019 0 0 0
2017026321 2017 0 0 0
2017032447 2017 0 0 0
2017018028 2017 0 0 0
2019018710 2019 0 0 0
2017016671 2017 0 0 0
2017030543 2017 0 0 0
2017010433 2017 0 0 0
2017003100 2017 0 0 0
2019026099 2019 0 0 0
2019020895 2019 0 1 .
2017027626 2017 0 0 0
2017015241 2017 0 0 0
2017013770 2017 0 0 0
2017031074 2017 0 1 .
2017013662 2017 0 0 0
2019000979 2019 0 0 0
2019017128 2019 0 0 0
2017021557 2017 0 0 0
2017018848 2017 0 0 0
2017006892 2019 0 0 0
2017034413 2017 0 0 0
2017031695 2017 0 0 0
2017002336 2019 0 0 0
2017005374 2017 0 0 0
2017005802 2017 1 0 .
2019001602 2019 1 0 .
2017016524 2017 0 0 0
2017020351 2017 0 0 0
2013023755 2019 0 0 0
2019033858 2019 0 1 .
2017008421 2017 0 0 0
2017009858 2017 1 0 .
2017024534 2017 0 0 0
2017002645 2017 0 0 0
2019018444 2019 0 0 0
2013008143 2019 0 0 0
2015009335 2019 0 0 0
2017033765 2017 0 0 0
2019003479 2019 0 0 0
2019026693 2019 0 0 0
2019012752 2019 0 0 0
2017019233 2017 0 0 0
2017022767 2017 0 0 0
2019009029 2019 0 0 0
2013021697 2019 1 1 1
2017036695 2017 0 0 0
2017000083 2017 0 0 0
2017026489 2019 0 0 0
2017027233 2017 0 0 0
2017019906 2019 0 0 0
2013024491 2019 0 0 0
end

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关键词：虚拟变量设定 虚拟变量 generated generate install