Chen Guorong, Wang Sijian, Sun Guannan, Pan Huanxue
Department of Finance, Beijing Forestry University, Beijing, China.
Department of Statistics and Biostatistics, Rutgers University, New Brunswick, NJ, USA.
Acta Biotheor. 2020 Jun;68(2):295. doi: 10.1007/s10441-020-09377-w.
The authors have retracted this article [1] because they found a fundamental mistake in the methodology that is not correctable at this time. This mistake is found in the methodology and the derivation of the model with Tukey and Huber's losses. Because of the error, the findings in the article are not reliable. All authors agree to this retraction.
