 
reshape long rank, i(id code) j(year)
(note: j = 0 1 2 3 4 5 6 7 8 9 10 11 12 99)
(note: rank0 not found)
(note: rank1 not found)
(note: rank2 not found)
(note: rank3 not found)
(note: rank4 not found)
(note: rank5 not found)
(note: rank6 not found)
(note: rank7 not found)
(note: rank8 not found)
(note: rank9 not found)
Data                               wide   ->   long
-----------------------------------------------------------------------------
Number of obs.                      215   ->    3010
Number of variables                  18   ->      16
j variable (14 values)                    ->   year
xij variables:
                 rank0 rank1 ... rank99   ->   rank
-----------------------------------------------------------------------------
我的原始数据是1999至2012年,后来发现跑命令时候总提示出错,看了例子觉得应该是我的year和例子的格式不太一样,就把year的格式改为99,00,01,02,然后结果中00-09数据都缺失,我觉得是系统不认00-09这种时间模式,求各位指教该怎么解决,多谢