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May 20,  · It is typically assumed that disturbances in panel data models are cross-sectionally independent. This is particularly true of panels with large cross-sectional dimension (N).In the case of panels where N is small (say 10 or less) and the time dimension of the panel (T) is sufficiently large, the cross-correlations of the errors can be modeled (and tested .

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Aug 27,  · repeated time values within panel,各位同仁大家好,本人在用Stata处理面板数据的时候出现了下面的问题:. xtset Fim Yerrepeated time values within panelr();我检查了数据,没问题,然后输入:xtset Yer(时间变量)和xtset Fim(个体变量),结果如下:. xtset Yer panel variable: Yer (balanced). xtset Fim panel variable: Fim (unbalanced)但. Hi, I have panel data for 74 companies translating into observations (unbalanced panel). I need to test for multi-collinearity (i am using stata 14). Dec 20,  · “balanced和unbalanced面板数据到底有什么区别?” “平衡的意思是,如果按截面成员堆积数据,每个截面成员应包括正好相同的时期;如果按日期堆积数据,每个日期应包含相同数量的截面成员观测值,并按相同顺序排列。.

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The examples shown here use Stata’s command tsfill and a user-written command "carryforward" by David Kantor to 2 4 2 6 3 2 3 4 3 7 end tsset id time panel variable: id (unbalanced) time variable: time, 1 to 9, but with gaps delta: 1 unit we might want to get a completely balanced data. In this case, the starting. 今天有同学问我怎么将每一期的CFPS合并到成一个panel。这涉及到在Stata中最常用的两个合并命令,merge和append,其中merge是横向合并,用于追加变量。append是纵向合并,用于追加样本。多期截面组合成面板一般使用append命令。. 下面我使用CFPS和CFPS做一个简单 .