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  _____    _    _                ___      ______  
 |__  //  | || | ||     ___     / _ \\   /_   _// 
   / //   | || | ||    /   ||  | / \ ||  `-| |,-  
  / //__  | \\_/ ||   | [] ||  | \_/ ||    | ||   
 /_____||  \____//     \__ ||   \___//     |_||   
 `-----`    `---`       -|_||   `---`      `-`'   
                         `-`

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發送短信 : Choice Models in Marketing: Economic Assumptions, Challenges and Trends