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RWI Positionen #75

Evidenz zur Wirkung ausgewählter Klimaschutzmaßnahmen

German climate policy has been a topic of heated debate. In addition to the currently broadly discussed introduction of a uniform CO2 tax there are also a number of other measures worth considering in detail. The RWI has evaluated the effectiveness and efficiency of various climate policy instruments summarized in this RWI Position. The results show, for example, that making disclosure of information on energy performance mandatory for house sellers increases transparency in the real estate market. Furthermore, evaluations of the EU energy label highlight the possibilities of making households' consumption decisions more energy-efficient by adding operating costs to the label. Additional evaluations show that renewables increase the number of negative price peaks on the power market. Yet, a reform of the subsidy scheme may prevent this effect. The evaluations also illustrate which policies do not work: Although social comparison-based home energy reports lead to small energy savings, they are not cost effective in most industrialized countries and thus not to be recommended as a policy instrument.