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This paper aims to identify the key determinants of Chilean spot power price and assess their relative importance in recent price decline. To do so, we use a VAR model with weekly data between the years 2015-2016 and variance decomposition analysis to attribute variations of marginal cost to different shocks. The results show that while the availability of water for hydropower and lower fuel prices are important for explaining power spot prices, they only account for 50%-75% of the marginal cost's variance, leaving 25%-50% to other factors, such as more renewable generation and lower generation from oil sources, among other factors. [ABSTRACT FROM AUTHOR]

This paper estimates the residential outage cost in Chile's Central Interconnected System (SIC), using consumer's willingness to pay for energy. We first estimate the cost of reducing energy consumption efficiently, that is only the less valuable kWh (as indicated by the market demand curve) are rationed. Then we estimate the per-kWh cost of rationing by cutting off service. We find that the outage cost varies considerably depending on the length of the rationing period; and on how energy is rationed. Longer restrictions allow users to adjust more, and hence are cheaper. Similarly, we estimate that rationing efficiently is between two and six times cheaper than rationing by cutting off service. [ABSTRACT FROM AUTHOR]