Open Access
An economic model of behaviour: attitudes towards altruistic blood and organ donations
(2009) Cabasés Hita, Juan Manuel; Errea Rodríguez, María; Economía; Ekonomia
The aim of this research is to model altruistic blood and organ donors behaviour. First, we make an analysis of the decision of to be or not to be a donor for any individual. We propose a model where individuals compare the expected utility of deciding to become a donor, with the utility of the alternative decision (not to become a donor). Second, we continue with the identification of the variables having influence over this decision, the expected effects of such a donation (positive and negative) and the importance of the expectations over individuals well-being and the subsequent decision. We work with rational individuals that behave altruistically when making a decision. The model is specific because the goods we consider can only cover vital needs. We posed hypothesis about some variables for each kind of the donations considered (blood and organ donations). This hypothesis can be useful to identify which are the variables having influence actually over this decision. We propose a pilot survey to test our model. First results from a university students survey show the relevant variables influencing blood an organ donations, and seem to confirm the model.
Open Access
Comparing the psychometric properties of the EQ-5D-5L between mental and somatic chronic patients populations
(2013) Cabasés Hita, Juan Manuel; Errea Rodríguez, María; Hernández Arenaz, Íñigo; Economía; Ekonomia
The validity and reliability of the EQ-5D-5L in comparison with the standard 3L has been tested through the analysis of psychometric properties making use of different samples of patients. However, it is likely that the condition of the illness may affect the power of the 5L version with respect to the 3L one. Here we report on parallel testing of EQ-5D-5L and 3L administered to a sample of chronic patients of both somatic and mental illness. The aim of this study is to check some psychometric properties in both subsamples. Methods: We check for the usual psychometric properties: feasibility, (in)consistency, ordinality (and transitivity), informativity, face validity and convergent validity. Also, we perform new analysis for checking transitivity and the Cronbach-? for convergent validity. Finally, we proposed a complementary way for looking at the property of informativity through three different indexes (effective, absolute and overall) based on the statistical discriminatory power. Data: We have a total of 1002 questionnaires finally collected. 444 (46.25%) chronic mental patients, 516 (53.75%) have somatic chronic illnesses; 42 observations of unknown origin of the illness have been dropped to perform this analysis. Results: The mean value reported in the VAS for the full sample is 60.93. Somatic patients report a mean of 64.42 points in this scale and mental patients report 56.83 points in the VAS. Analyzing the distribution of the responses to problems on each dimension we found, for all cases, a highly skewed distribution. Moreover, the distribution of responses changes significantly between subsamples, as expected. In all dimensions, it seems that somatic patients take more advantage of the extra levels introduced by the EQ-5D-5L. This group reduces to a greater extent the missing response rate, commit less (and of lower importance) inconsistencies, get a higher correlation of the 5L scale and the VAS within the 3L levels, complements better the dimensions to get an overall score (measured through the Cronbach’s alpha), reduces in a more significant way the “no problem” response and the Informativity gain is also superior (for both the Shannon Evenness Index and our Absolute Index). This higher performance of the EQ-5D-5L on somatic patients is endorsed by a higher preference of somatic patients toward the 5L version of the questionnaire than to the 3L one. Conclusion: Results show the suitability of the 5L version in both subsamples, but it is much more effective for somatic patients. These subsamples’ differences may be of concern when aggregating and comparing different data.
Open Access
Attitudes towards blood and living organ donations
(2010) Cabasés Hita, Juan Manuel; Errea Rodríguez, María; Economía; Ekonomia
We model the decision of whether or not to become a blood/living organ donor. The expected utility for becoming a donor is a function of the degree of altruism, the consumption of goods, the costs of donation, the very pleasure of giving, and the recipient’s utility associated to donation. Empirically, we observe differences in the expected costs and benefits from donation between blood and non-blood donors, and between individuals with different willingness to donate living organs. Looking at benefits/costs of donation through reasons for donating/not donating, we conclude policies to encourage donation should focus on raising awareness and provide information.
Open Access
Incentives when altruism is impure: the case of blood and living organ donations
(2013) Errea Rodríguez, María; Cabasés Hita, Juan Manuel; Economía; Ekonomia
The decision to donate blood and living organs is considered voluntary and altruistic. However, the shortage of donors has opened an interesting debate in recent years, considering offering economic incentives to donors. This paper analyzes theoretically and empirically, the effects of incentives over individuals when facing the decision of becoming donors. Results show that crowding-in of blood donors would be more likely by offering 'Information concerning blood donations' or 'Blood Tests'. In both, blood and living organ donations, 'Money' would be very likely to crowd-out individuals from donating. Concerning living organs, we do not find good evidence for crowding-in. We conclude donation policies, properly designed, could help to increase the number of donors, and more specifically suggest implementing non-monetary incentives.

Cabasés Hita, Juan Manuel

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