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|Extract & analyse data from the public versions of DECC's NEED dataset|
|Original data available from: UK DATA ARCHIVE: Study Number 7518 - National Energy Efficiency Data-Framework, 2014|
|* This dataset is a sample of just over 4 million households which have had an Energy Performance Certificate from the full NEED 'all dwellings' dataset|
|* Is this all those who have had an EPC or a random sample of all those who've had an EPC?|
|* Sample bias is unkown - which kinds of dwellings have an EPC?|
|* Gcons<year>valid variable has undefined labels: G, L, M = ? Presumably 0 = off gas & V = valid?|
|* ideally DECC should set missing to -99 to aid re-coding and avoid unpleasant surprises in naive analysis!|