Author's central thesis: consumers respond to EXPECTED marginal price, not observed marginal or average price; the expected-marginal-price estimates are the headline. || 'The results suggest that most consumers are probably responding to the expected marginal price or even less precise information about what marginal price they will face.' (Abstract, p.1)
Borenstein, S. (2009). "To what electricity price do consumers respond? Residential demand elasticity under increasing-block pricing." Haas WP