Description Usage Arguments Value Author(s) References See Also Examples

This function calculates Incremental Net Monetary Benefit (INMB) Scores that are expressed in Cost units. While these scores are of "linear" form, (lambda * Effe) - Cost, when eta == gamma / beta == 1, they are "Nonlinear" when eta is either > 1 or < 1.

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`tr` |
Binary [0 or 1] indicator of Treatment Regimen received by each patient [Experimental Unit]: tr == 0 denotes the "Standard" Regimen, tr == 1 denotes a "New" Regimen. |

`ex` |
Numeric vector representing Effe measures observed for 2 or more experimental units. |

`cy` |
Corresponding numeric vector reporting Total Cost Incurred by patients during treatment. The tr, ex and cy vectors must be of the same length, n >= 2, and 1 < sum(tr) < n. |

`lambda` |
Positive value for the fair, full-retail Shadow Price of Health. When ex is measured in QALYs and cy in U.S. Dollars, lambda = 50000 is traditionally assumed appropriate. |

`beta` |
Positive Returns-to-Scale Power parameter for ICE Preference calculations. beta = 1 implies Linear (Constant) Returns-to-Scale. A beta > 0 but < 1 implies Returns-to-Scale that are Diminishing and tend to be highly Realistic. Any beta > 1 implies Increasing Returns-to-Scale. |

`eta` |
Positive Power Parameter Ratio: gamma / beta. Generalized "linear" maps result when eta = 1. An eta ratio > 1 can yield a realistic "Nonlinear" map, but maps with eta > 3+2*sqrt(2) = 5.828 (Obenchain's "Omega") violate the "Cartesian Monotonicity" Axiom. |

Object of class "numeric" of the same length as the tr, ex and cy vectors input:

`pref` |
Computed ICE Economic Preference Scores. |

Bob Obenchain <wizbob@att.net>

Hoch JS, Briggs AH, Willan AR. Something old, something new, something borrowed,
something blue: a framework for the marriage of health econometrics and
cost-effectiveness analysis. *Health Economics* 2002; **11**: 415-430.

Obenchain RL. ICE Preference Maps: Nonlinear Generalizations of Net Benefit and Acceptability.
*Health Serv Outcomes Res Method* 2008; **8**: 31-56. DOI 10.1007/s10742-007-0027-2.
Open Access.

`plot.ICEepmap`

and `print.ICEepmap`

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