This report, prepared for the Federal Energy Regulatory Commission (FERC), assesses the economic and reliability implications of different resource adequacy standards. We examine the widely-used one-day-in-ten-years (1-in-10) loss of load standard, compare it to alternative approaches to defining resource adequacy, and evaluate the implications of different resource adequacy standards from a customer cost, societal cost, risk mitigation, market structure, and market design perspective.

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