面对众多国家大量的实证证据，经济学家们进行了比较和回归分析。
Faced with vast quantities of empirical evidence, economists like to run cross-country comparisons and regressions.
其次对我国的地区经济差距进行了实证分析。
Secondly, the paper USES positive analysis to describe regional economic disparity.
除理论研究外，本文还通过实证定量分析，论证了虚拟电信运营模式在经济上的合理性。
Except for the theory research, it also argues the economic rationality of the virtual network operation mode by some quantitative demonstration analysis.
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