求翻译：二是绝大多数研究将面板变量各横截面序列作为一个整体进行回归建模或协整分析，没有分析面板变量沿各个截面的差异。是什么意思？

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Study 2 is that the great majority of the Panel variable cross-section series as a whole for regression modeling or analysis throughout society, there is no analysis panel variables along the cross-sectional differences.

Two is the overwhelming majority research the kneading board variable various lateral sections sequence took a whole carries on the return modelling or cooperates the entire analysis, has not analyzed the kneading board variable along each section difference.

Second Research Panel is the most variable cross sectional regression modeling the sequence as a whole or Cointegration Analysis, there are no differences in analysis of Panel variables in each section.

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