Can we fix it? Yes we can! But what? A new test of procedural invariance in TTO-measurement.

@article{Attema2008CanWF,
  title={Can we fix it? Yes we can! But what? A new test of procedural invariance in TTO-measurement.},
  author={Arthur E. Attema and Werner B. F. Brouwer},
  journal={Health economics},
  year={2008},
  volume={17 7},
  pages={877-85}
}
The TTO-method is often used to value health states, but it is susceptible to several biases and methodological difficulties. One of these is a violation of procedural invariance, which means that the way a TTO-question is framed, i.e. either by fixing the period in imperfect health or that in perfect health, can have a substantial effect on the elicited value of a health state. There are four important sources of discrepancy of the two procedures: loss aversion, maximum endurable time, scale… CONTINUE READING

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