Fitting a Gompertz Curve
提出一种简单的Gompertz曲线拟合方法，可检验饱和水平的稳定性且无需已知其值即可预测，并以荷兰汽车存量预测为例展示其优势。
In this paper, a simple Gompertz curve-fitting procedure is proposed. Its advantages include the facts that the stability of the saturation level over the sample period can be checked, and that no knowledge of its value is necessary for forecasting. An application to forecasting the stock of cars in the Netherlands illustrates its merits.