Table 1.

Summary of data sources used for emissions projections

	IO VARIABLE	DESCRIPTION	DATA SOURCE
ENERGY, ECONOMY AND EMISSIONS	UK carbon intensities (e)	Based on estimated emissions savings from existing and planned climate policies, alongside energy supply analysis	BEIS energy and emissions projections (Department for Business Energy and Industrial Strategy, 2018)
	Aggregate level of household expenditure (a component of y)	Central estimate from econometric trends of real disposable household income	UK Office for Budget Responsibility’s (OBR) economic and fiscal outlook used in BEIS energy and emissions projections (Department for Business Energy and Industrial Strategy, 2018)
	Government and capital spend (a component of y)	Central projections of real UK economic growth	UK Office for Budget Responsibility’s (OBR) economic and fiscal outlook used in BEIS energy and emissions projections (Department for Business Energy and Industrial Strategy, 2018)
	Foreign expenditure on UK exports (a component of y)	Central projections of real world GDP	International monetary Fund’s World Economic Outlook until 2022 thereafter following UK GDP growth projections used in BEIS energy and emissions projections (Department for Business Energy and Industrial Strategy, 2018)
MATERIAL PRODUCTIVITY	Production recipes (A)	Reduce material inputs through redesigning differently	Case study evidence (supporting information on the Web, sheet B)
	Final consumption patterns (a component of y)	Reduce demand for final products	Case study evidence (supporting information on the Web, sheet B)