This is an early access version, the complete PDF, HTML, and XML versions will be available soon. Open AccessArticle by Genhasi Ge 1,2,*, Daoping Wang 1 and Mesumbe Bianca Epede 1 1 School of Economics and Management, University of Science and Technology Beijing, Beijing 100083, China 2 School of Statistics and Mathematics, Inner Mongolia University of Finance and Economics, Hohhot 010070, China * Author to whom correspondence should be addressed. Academic Editor: Paul B.