further quantitybased interventions are typically easier to administer than more complex pricebased incentives making them particularly useful tools for countries with weak administrative capacity many of these instruments are already utilized by developing countries green investment tax credits are used in developing countries public investment is used in while feedin tariffs which guarantee prices to clean energy producers above the existing market price are used in including algeria mongolia sri lanka and uganda ren many of these mechanisms have been criticized for locking in subsidies that then become politically difficult to remove although putting time limits on them can help reduce this risk somewhat