This manuscript contains original unpublished work and is not being submitted for publication elsewhere at the same time.
Scoring the Icecap-a Capability Instrument. Estimation of a UK General Population Tariff†
Article first published online: 20 NOV 2013
© 2013 The Authors. Health Economics published by John Wiley & Sons Ltd.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Volume 24, Issue 3, pages 258–269, March 2015
How to Cite
2015), Scoring the Icecap-a Capability Instrument. Estimation of a UK General Population Tariff, Health Econ., 24; pages 258–269, doi: 10.1002/hec.3014, , , , , and (
- Issue published online: 23 JAN 2015
- Article first published online: 20 NOV 2013
- Manuscript Accepted: 10 OCT 2013
- Manuscript Revised: 30 MAY 2013
- Manuscript Received: 5 DEC 2012
- UK Medical Research Council. Grant Number: G0701027
- discrete choice experiments;
- best–worst scaling;
- capability approach;
- economic evaluation;
- variance heterogeneity
This paper reports the results of a best–worst scaling (BWS) study to value the Investigating Choice Experiments Capability Measure for Adults (ICECAP-A), a new capability measure among adults, in a UK setting. A main effects plan plus its foldover was used to estimate weights for each of the four levels of all five attributes. The BWS study was administered to 413 randomly sampled individuals, together with sociodemographic and other questions. Scale-adjusted latent class analyses identified two preference and two (variance) scale classes. Ability to characterize preference and scale heterogeneity was limited, but data quality was good, and the final model exhibited a high pseudo-r-squared. After adjusting for heterogeneity, a population tariff was estimated. This showed that ‘attachment’ and ‘stability’ each account for around 22% of the space, and ‘autonomy’, ‘achievement’ and ‘enjoyment’ account for around 18% each. Across all attributes, greater value was placed on the difference between the lowest levels of capability than between the highest. This tariff will enable ICECAP-A to be used in economic evaluation both within the field of health and across public policy generally. © 2013 The Authors. Health Economics published by John Wiley & Sons Ltd.