Ceilings to use for the `nca`

or `nca_analysis`

methods

> nca(data, c(1, 2), 3, ceilings=c('ols', 'ce_fdh', 'cr_fdh'))

Note that the ols regression line is not a ceiling but is included as a reference.

Ceiling Technique | Name |

lh | Low-High |

cols | Corrected Ordinary Least Squares |

qr | Quantile Regression |

sfa | Stochastic Frontier Analysis |

ce_vrs | Ceiling Envelopment with Varying Return to Scale |

cr_vrs | Ceiling Regression with Varying Return to Scale |

ce_fdh | Ceiling Envelopment with Free Disposal Hull |

cr_fdh | Ceiling Regression with Free Disposal Hull |

c_lp | Ceiling Linear Programming |

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