RT Journal Article T1 Improving scope sensitivity in contingent valuation: Joint and separate evaluation of health states A1 Pinto‐Prades, José Luis A1 Robles-Zurita, José Antonio A1 Sánchez-Martínez, Fernando Ignacio A1 Abellán‐Perpiñán, José María A1 Martínez‐Pérez, Jorge K1 Accidentes de tráfico - Prevención - Aspectos económicos AB We present data of a contingent valuation survey, testing the effect of evaluationmode on the monetary valuation of preventing road accidents. Half of the intervieweeswas asked to state their willingness to pay (WTP) to reduce the risk of havingonly 1 type of injury (separate evaluation, SE), and the other half of the samplewas asked to state their WTP for 4 types of injuries evaluated simultaneously (jointevaluation, JE). In the SE group, we observed lack of sensitivity to scope while inthe JE group WTP increased with the severity of the injury prevented. However,WTP values in this group were subject to context effects. Our results suggest thatthe traditional explanation of the disparity between SE and JE, namely, the so‐called“evaluability,” does not apply here. The paper presents new explanations based onthe role of preference imprecision. PB Wiley Online Library YR 2017 FD 2017 LK https://hdl.handle.net/10630/37089 UL https://hdl.handle.net/10630/37089 LA eng NO Pinto‐Prades, J. L., Robles‐Zurita, J. A., Sánchez‐Martínez, F. I., Abellán‐Perpiñán, J. M., & Martínez‐Pérez, J. (2017). Improving scope sensitivity in contingent valuation: Joint and separate evaluation of health states. Health Economics, 26(12), e304-e318. NO Road Traffic Directorate General (DirecciónGeneral de Tráfico), Grant/Award Number:unrestricted grant.Consejería de Economía,Innovación, Ciencia y Empleo, Junta deAndalucía, Grant/Award Number: (proyectode excelencia código P09‐SEJ‐4992). DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 21 ene 2026