用OLS估计时，由于因变量的滞后项和不可观察的地区效应正相关，OLS估计量应该是向上偏倚的（biased upwards）。
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biased upwards
有偏见的向上
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Nor is it true, as some commentators allege, that the first estimate is biased downwards - that they generally underestimate the strength of the economy and will be revised upwards as later estimates emerge.
BBC: UK economy: GDP figures explained by ONS
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