Involvement in environmental causes, does the joint effect between subjective income and the performance of the country matter?

Previous research has shown that richer people are more likely to engage in an environmental cause. We extend it by considering the joint effect between subjective income and a set of macroeconomic variables. For doing so, we employ the fifth wave of the World Values Survey (WVS). This study provides clear evidence that even when both factors matter, peoplés attitudes crucially depend on the interaction effect. Hence, those measures that affect the characteristics of the country would also change the disposition to be involved.