Challenge: Regression Diagnostics and Sensitivity Analysis

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Problem statement

Reestimate the trade-growth model in Frankel and Romer for the year 1990. Display the following diagnostic plots for the model simultaneously:

  • Residuals versus fitted values
  • Normal Q-Q plot
  • Scale-location plot of the square root of residuals against fitted values
  • Cook’s D versus observation numbers
  • Residuals versus leverages
  • Cook’s D versus leverage/(1-leverage)

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