An Allometric Algorithm for Fractal-Based Cobb-Douglas Function of Geographical Systems

الملخص EN

The generalized Cobb-Douglas production function has been derived from a general input-output relation based on fractality assumptions.

It was proved to be a useful self-affine model for geographical analysis.

However, the ordinary least square calculation is always an ineffectual method for the Cobb-Douglas modeling because of the multicollinearity in the logarithmic linear regression.

In this paper, a novel approach is proposed to build the geographical Cobb-Douglas models.

Combining the concept of allometric scaling with the linear regression technique, we obtain a simple algorithm that can be employed to estimate the parameters of the Cobb-Douglas function.

As a case, the algorithm and models are applied to the public transportation of China’s cities, and the results validate the allometric algorithm.

A conclusion can be drawn that the allometric analysis is an effective way of modeling geographical systems with the general Cobb-Douglas function.

This study is significant for integrating the notions of allometry, fractals, and scaling into a new framework to form a quantitative methodology of spatial analysis.