This study presents an innovative approach to hand-coding parties’ policy
preferences in the relatively new, cross-sectoral field of climate change
mitigation policy. It applies this approach to party manifestos in six
countries, comparing the preferences of parties in Denmark, France, Germany,
Ireland, Italy and the United Kingdom over the past two decades. It probes the
data for evidence of validity through content validation and
convergent/discriminant validation and engages with the debate on
position-taking in environmental policy by developing a positional measure that
incorporates ‘pro’ and ‘anti’ climate policy preferences. The analysis provides
evidence for the validity of the new measures, shows that they are distinct from
comparable measures of environmental policy preferences and argues that they are
more comprehensive than existing climate policy measures. The new measures
strengthen the basis for answering questions that are central to climate
politics and to party politics. The approach developed here has important
implications for the study of new, complex or cross-cutting policy issues and
issues that include both valence and positional aspects.