The main purpose of this study is to introduce three new indexes. In order to investigate the attitude and the capacity of communities, the entrepreneurial attitude index and the entrepreneurship capacity index were theoretically generated. This study proposed a non-linear regression approach to discussing the relationship between these indexes. The allometric relationship, as the nonlinear and well-fitted model, demonstrated that the variations of the entrepreneurship capacity index are entrepreneurial attitude index by about 56%. Finally, the entrepreneurship attitude dispersion index, as the third index of this research, was extracted from the difference between the entrepreneurship capacity index and the entrepreneurial attitude index. By using the entrepreneurship attitude dispersion index and statistical methods, a ranking list of countries was developed, proving that entrepreneurial attitude dispersion index is able to improve the economic categorization of countries.