2.4. Data analyses
After data cleaning, recoding and explorative descriptive analyses,
we applied a 1.5% cut-off point forWTP values as default, to avoid unrealistically
high values forWTP. This cut-off is similar to values reported
in the literature; this roughly corresponds to a cut-off based on expendable
income of €3000 per person/month (Desaigues et al., 2011). Thus,
all reported means and medians are trimmed. In addition, we excluded
‘Protest votes’ and ‘Don't know’ responses. For the UK,we converted the
values of the national currency into Euros.WTP values are presented in
€ per person per year (€ pp/y).