Most policies consist of mixes, new interventions being implemented on top of already existing policies. Whether this is a good idea or not is often unclear: evaluating policy mixes is difficult, and a clear picture is lacking of how to move ahead.
- screens and reviews the wider academic literature to deﬁne the concept of policy mixes;
- discusses the justiﬁcations for using a policy mix;
- explores the methodologies for evaluating them.
In deﬁning a policy mix we make a distinction between policy objective mixes and policy instrument mixes. Justiﬁcations for policy objective mixes generally lie in the domain of distributional concerns and other political issues, whereas justiﬁcations for policy instrument mixes are mostly related to speciﬁc market, governance or behavioural failures.
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