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Academic Journal of Business & Management, 2022, 4(2); doi: 10.25236/AJBM.2022.040207.

The Delivery Industry Analysis


Zilan Wang

Corresponding Author:
Zilan Wang

Capital University of Economics and Business


Four different delivery companies are discussed in this paper. The purpose is to see whether there is a vast difference in the distributions of the daily percentage returns among five different periods. Three fitted models have been applied for daily returns on each period: the Normal maximum-likelihood fitted model, the Normal robust-fitted model, and the Laplace maximum-likelihood fitted model. The analyses suggest no apparent difference between Chinese and American delivery companies. However, because the main business of Heartland Express is different from the other companies, its results are unlike the other three.


The Normal Maximum-Likelihood Fitted Model; the Normal Robust-Fitted Model; the Laplace Maximum-Likelihood Fitted Model; Industry; Epidemic Effect

Cite This Paper

Zilan Wang. The Delivery Industry Analysis. Academic Journal of Business & Management (2022) Vol. 4, Issue 2: 42-49. https://doi.org/10.25236/AJBM.2022.040207.


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