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  _____    __   __    _____     _____     _____   
 /  ___||  \ \\/ //  |__  //   |  ___||  /  ___|| 
| // __     \ ` //     / //    | ||__   | // __   
| \\_\ ||    | ||     / //__   | ||__   | \\_\ || 
 \____//     |_||    /_____||  |_____||  \____//  
  `---`      `-`'    `-----`   `-----`    `---`

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Text this: Approximations to the Distribution Functions of the Ordinary Least Squares and Two-Stage Least Squares Estimators in the Case of Two Included Endogenous Variables