上海居民消费恩格尔系数的灰色建模和预测

SETTING UP GREY MODEL AND FORECASTING ENGEL'S COEFFICIENT OF SHANGHAI RESIDENTS

应用灰色系统理论的GM（1，1）建模方法，对上海城市居民消费恩格尔系数进行建模，通过残差修正提高模型的拟合精度，并按修正模型进行了恩格尔系数预测。

This paper shows how to apply the GM(1, 1 ) Grey model of Grey System theory to model the Engel's coefficient of Shanghai residents' consumption so as to forecast it in the future. After the forecasting precision of the model is enhanced by well revising the difference between the actual value and the forecasting value, the grey forecast of Engel, s coefficient is made by the revised model.