求助,想要生成一个虚拟变量After,若某年度award=1 则让此年度之前的After=0,此年度及以后After=1。共有5年的数据(2016-2020)年
- * Example generated by -dataex-. To install: ssc install dataex
- clear
- input long ID float year byte Award
- 16 2016 0
- 16 2017 0
- 16 2018 0
- 16 2019 0
- 16 2020 0
- 25 2016 0
- 25 2017 0
- 25 2018 0
- 25 2019 0
- 25 2020 0
- 31 2016 0
- 31 2017 0
- 31 2018 0
- 31 2019 0
- 31 2020 0
- 55 2016 0
- 55 2017 0
- 55 2018 0
- 55 2019 0
- 55 2020 1
- 59 2016 0
- 59 2017 0
- 59 2018 0
- 59 2019 0
- 59 2020 0
- 60 2016 0
- 60 2017 1
- 60 2018 1
- 60 2019 1
- 60 2020 1
- 61 2016 0
- 61 2017 0
- 61 2018 0
- 61 2019 1
- 61 2020 1
- 63 2016 1
- 63 2017 1
- 63 2018 0
- 63 2019 1
- 63 2020 0
- 70 2016 0
- 70 2017 0
- 70 2018 0
- 70 2019 0
- 70 2020 0
- 88 2016 0
- 88 2017 0
- 88 2018 0
- 88 2019 0
- 88 2020 0
- end
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