我面板数据设置时,提示平衡
xtset id quarter
panel variable: id (strongly balanced)
time variable: quarter, 2006q4 to 2018q4
delta: 1 quarte
做门槛分析时,又提示非平衡
xthreg invest Tq_1 r gdpg, rx(epu_1) qx(epu_1) trim(0.01) bs(300)
Panel threshold model need balanced panel, check your data!
做面板转变时,输入季度数据无法识别
xtbalance , rang(2006q4 2018q4)
range() invalid -- invalid numlist
输入年度数据,则所有数据全删除
xtbalance , rang(2006 2018)
(56399 observations deleted due to out of range)
#1 in option range(#1,#2) i.e., 2006 must be greater than ., the smallest year in sample.
请问各位老师,是什么原因,该怎么处理


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