This paper presents a test of the predictive validity of various classes of QALY models (i.e., linear, power and exponential models). We first estimated TTO utilities for 43 EQ-5D chronic health states and next these states were embedded in health profiles. The chronic TTO utilities were then...

This paper tests the internal consistency of time trade-off utilities. We find significant violations of consistency in the direction predicted by loss aversion. The violations disappear for higher gauge durations. We show that loss aversion can also explain that for short gauge durations time...

Expected utility theory (EUT) has been challenged as a descriptive theory in many contexts. The medical decision analysis context is not an exception. Several researchers have suggested that rank dependent utility theory (RDUT) may accurately describe how people evaluate alternative medical...

The Lead Time Trade-Off (L-TTO) is a variant of the TTO method which attempts to overcome some of the problems of the most widely used method for health states worse than death (SWD). Theoretically, the new method reduces the problems detected when researchers have elicited preferences for SWD....

In the management of waiting lists point systems could be a useful mechanism to establish priorities amongst patients. In this paper we explore the possibility of using Conjoint Analysis (CA) in order to implement a point system based on social preferences. We conducted an experiment for the...

When individuals take part in decision experiments, their answers are typically subject to some degree of noise / error / imprecision. There are different ways of modelling this stochastic element in the data, and the interpretation of the data can be altered radically, depending on the...

In the management of waiting lists, point systems could be a useful mechanism to establish priorities amongst patients. In this paper we explore the possibility of using Conjoint Analysis (CA) in order to implement a point system based on social preferences. We conducted an experiment for the...

In cost-effectiveness analysis (CEA) it is usually assumed that a QALY is of equal value to everybody, irrespective of the patient's age. However, it is possible that society assigns different social values to a QALY according to who gets it. In this paper we discuss the possibility of weighting...

The Person Trade-Off (PTO) is a methodology aimed at measuring the social value of health states. The rest of methodologies would measure individual utility and would be less appropriate for taking resource allocation decisions. However few studies have been conducted to test the validity of the...