It also set different tariffs for different technological options (based on the respective cost of generation plus a reasonable profit) and guaranteed them for 20 years. Many developing countries have followed this model, comprising so-called Advanced Renewable Tariffs, since it corresponds with standard practice in respect of other private electricity plants. In most cases, although tariffs are expressed as a percentage of the retail rate, they are in effect based on the cost of generation plus profit. This creates a disincentive for producers, who fear future policy changes in case of large-scale uptake of renewable energy generation. In this regard, a FIT option can be successful in developing countries only if it is backed by an international guarantee, and internationally funded subsidies for low-income consumers. These risks are probably higher in the developing parts of the world because of their limited financial resources and institutional capabilities for establishing effective policies and measures that lead towards a new phase of growth characterized by pervasive decarbonization.