On the Improved of New Growth Model Namely Korkmaz Model and its Comparison with Some Growth Models
Abstract
For growth models, in addition to some classical growth models, a new model, Korkmaz model was derived before. In this study, this new Korkmaz model was improved. It is known that growth model was derived by using the following expression: “Growth models has generally sigmoidal shape. In this shape, there is one inflection point. Until this inflection point, the graph is convex. At this inflection point the growth rate reaches maximum value. After this inflection point the graph is concave.” Growth models were generally derived by using the last part of this expression. Although Korkmaz model used the entire part up to the last part, it ignored this last part. In this study, Korkmaz model has been improved to take this last part into account as well as using all the other parts. After introducing this improved Korkmaz model, this new model was applied to one data set. In addition to improved Korkmaz model, the growth models such as Logistic, Brody, Gompertz, Von Bertalanffy and Korkmaz model were used. They are compared by using error sum of squares criterion.
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References
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