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

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Text this: Factor Substitution and Endogenous Growth