This research aims to estimate the economic loss from the Feed-in Tariff (FiT) policy and also proposes an appropriate purchase price for each energy source in power generation. The study employs data from IRENA, IEA, IPCC, EIA, EGAT, EPPO, ERC, CEIC, the World Bank, and the Bureau of Trade and Economic Indices from the first quarter of 1993 through the first quarter of 2019. Before determining an appropriate purchase price, a demand and supply curve is created by using the Seemingly Unrelated Regression (SUR) method and investigating the ...