求翻译：最近的文献研究表明，在面板数据基础上进行单位根检验，相比单个时间序列，具有更高的可靠性，通常的检验方法为Fisher-ADF检验。Fisher-ADF面板数据单位根检验的原假设是存在单位根，但个体的单位根不同，通过先计算各个单元的统计量，然后再构造面板统计量进行检验，同时Fisher-ADF检验还考虑了单元之间的相关性。滞后项的选择仍然是以AIC为标准，对每个个体的滞后项数进行选择。单位根检验结果如表2。是什么意思？

The recent literature studies have shown that, on the basis of the panel data unit root test, compared to a single time series, with higher reliability, the usual test methods for the inspection of the fisher-adf. the fisher-adf panel data unit root test the null hypothesis that there is unit root,

Recent research has shown that in panel data 单位根 inspection on the basis of a single time series, compared with a high degree of reliability, and is usually the method of examination for Fisher - ADF inspection. Fisher - ADF 单位根 Inspection Panel data of the original hypothesis is the existence of th

Recent literature has shown that, in Panel unit root tests on the basis of data, compared to a single time series, with high reliability, usually testing method for Fisher-ADF testing. Data Fisher-ADF Panel unit root is the null hypothesis of unit root tests exist, but the individual units of differ