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| '--' || | || | ||  |    \\   | ||__   / //---`' 
| .--. || | \\_/ ||  | [] ||   | ||__   \ \\___   
|_|| |_||  \____//   |  __//   |_____||  \_____|| 
`-`  `-`    `---`    |_|`-`    `-----`    `----`  
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發送短信 : A Data Envelopment Analysis Approach to Portfolio Selection: An Application to the Blue Chip Stocks in the Philippine Stock Exchange (2010-2019)