panel date的用法和样例：
例句
- This paper's econometric analysis of household level panel data from China largely corroborates these theoretical propositions.
本文利用面板数据的计量分析在很大程度上证明了后悔效应的存在。 - This paper explores the effect of integration of trade and investment on the R&D investments by panel data model and principal components analysis.
本文利用面板数据模型，结合主成分分析法，研究了中国贸易投资一体化对研发投入的影响。
