EVA's approach is classic "bottom-up" analysis, from rig counts, gas deliverability, and gas storage for natural gas prices; worldwide oil demand and supply balances, including OPEC and Non-OPEC production assessments for oil prices; detailed mine cost and transportation cost analysis for coal prices; built up regional and sub-regional forward price curves for electricity prices; and price forecasts responsive to unfolding regulatory events and detailed SO2, NOx, and CO2 tonnage accounting for environmental commodities.