以下是一小部分数据。
copy starting from the next line ------ ----------------
- * Example generated by -dataex-. To install: ssc install dataex
- clear
- input str2 id float(year equity)
- "1" 2000 0
- "2" 2000 0
- "2" 2002 0
- "3" 2001 0
- "3" 2003 .1
- "4" 2000 .1
- "4" 2001 .1
- "4" 2002 .25
- "4" 2003 .25
- "5" 2004 1
- "6" 2002 0
- "6" 2004 1
- "6" 2005 0
- "7" 2005 .1
- "7" 2006 .2
- end
copy up to and including the previous line - ----------------


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