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Department of Economics
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adjustment Appliance class appliance ownership appliance stock assumption average Z-U effect calculated Chapter classes of appliances coefficients constant constraints defined demand equation demand function elasticities electrical appliances England and Wales estimated exogenous variables F-test final rate Pef gas supply heaters Hence Heteroscedasticity homoscedasticity hours of daylight Houthakker hypothesis implies included installed load kilowatts lag distribution lag0 lighting and sundry lognormal distribution marginal rate Merseyside moving-quarter obtained off-peak appliances off-peak demand off-peak space-heaters off-peak tariffs Ordinary Least Squares ownership levels ownership of off-peak ownership variables parameters price of electricity price of gas price of solid proportion of consumers quantity demanded regression residuals sample means seasonal pattern serial correlation solid fuel South of Scotland space-heating specification standard errors stock of appliances sumers sundry appliances time-series tion total consumption expenditure type of appliance units billed unrestricted demand unrestricted tariffs unweighted means utilization functions variance-covariance matrix variations zero