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The relative value of farm animal welfare
Chilton, Susan M., (2006)
Preference learning versus coherent arbitrariness: NOAA guidelines or a learning design contingent valuation (LDCV)
Bateman, Ian J., (2006)
Learning design contingent valuation (LDCV): NOAA guidelines, preference learning and coherent arbitrariness
Bateman, Ian J., (2008)