Improved grey prediction models for the trans ‐ pacific air passenger market

Improved grey prediction models for the trans‐pacific air passenger market Chaug‐Ing Hsu a & Yuh‐Horng Wen b a Department of Transportation Engineering and Management , National Chiao Tung University , 1001 Ta Hsueh Road, Hsinchu, Taiwan, 30050 , R.O.C. Fax: b Department of Transportation Engineering and Management , National Chiao Tung University , 1001 Ta Hsueh Road, Hsinchu, Taiwan, 30050 , R.O.C. Published online: 21 Mar 2007.