经济变量(economic variables) 内 生变量与外生变量 内 生变量（ endogenous variables）指由经济模型内 部结构决定的变量。
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Economic forecasting models that established using method of ordinary regression analysis often have high error rate,for economic variables change petiodically,but regression model just reflect trend fluctuation.
经济指标的变动具有明显的周期性 ,普通的回归预期测模型仅能反映趋势变动 ,误差通常很大。
参考来源 - 含周期变动项的预测模型的建立与应用·2,447,543篇论文数据，部分数据来源于NoteExpress
It also serves as a barometer of investors' feelings about economic variables like inflation and recession.
此外，美国国债收益率也常作为晴雨表衡量投资者对通胀和衰退等经济变量的感觉。
An alarming number of economic variables are currently way out of line with what conventional economic models would predict.
一系列令人警觉的经济变量目前已经超出传统经济模型所能预测的范围。
Furthermore, some economic variables are inherently unpredictable; if they were predictable this would violate economic theory itself.
另外，一些经济变量本身就难以预测，如果可预测，将与经济理论本身相违背。
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