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  ______   __   __   _    _     ______    ______  
 /_____//  \ \\/ // | || | ||  /_   _//  /_   _// 
 `____ `    \ ` //  | || | ||   -| ||-     | ||   
 /___//      | ||   | \\_/ ||   _| ||_    _| ||   
 `__ `       |_||    \____//   /_____//  /__//    
 /_//        `-`'     `---`    `-----`   `--`     
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發送短信 : The endowment effect and the reference state: Evidence and manipulations