in other words ensuring that the tool is used in the correct context matters just as much if not more than the choice of the policy support tool itself recent oecd analysis seems to show however that pricebased support schemes such as fits and premiums might be more positively correlated with investors ability to raise private finance than quotabased schemes renewable energy certificates obligations and targets cardenasrodriguez et al when used in combination with fits or tgcs they can stimulate clean energy investment however because of their fiscal nature these mechanisms can create uncertainty for investors as they are influenced by national budget fluctuations and political priorities