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  ______     ___                 ___     _____    
 /_   _//   / _ \\    ____      / _ \\  |  __ \\  
   | ||    | / \ ||  |    \\   / //\ \\ | |  \ || 
  _| ||    | \_/ ||  | [] ||  |  ___  ||| |__/ || 
 /__//      \___//   |  __//  |_||  |_|||_____//  
 `--`       `---`    |_|`-`   `-`   `-`  -----`   
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Text this: Treatment Effect and Sensitivity Analysis for Self-Selected Treatment and Selectively Observed Response