Difference-in-difference Academic performance 1 Block rate 1 Budget control 1 Cutoff frequency 1 Difference-in-differences 1 Differences-in-differences 1 Elasticity 1 Electric power utilization 1 Financial inclusion 1 Functions 1 Increasing block rate 1 Increasing block rates 1 Junior high school 1 Price changes 1 Price elasticity 1 Price-elasticity 1 Residential Electricity demands 1 Residential electricity demand 1 School attendance 1 Symmetric response 1 Symmetric response to price change 1 Symmetric response to price changes 1 Tariff scheme 1 Tariff schemes 1 Taxation 1