Measuring household consumption spending
A difficulty with measuring local consumption spending is that the UK’s main source of household spending data is a budget survey – the Living Costs and Food Survey (LCFS) – with relatively small sample sizes. Each year the LCFS interviews only around 5,000 households, which leaves small or non-existent samples in some local authorities. We solve this issue using a statistical estimator that combines information in the LCFS with information from additional sources. These include: a much larger dataset on local ages, family sizes, housing type and education levels (the Annual Population Survey); information on credit and debit card spending by households in different locations; and a measure of local energy consumption. When the sample sizes in an area in the LCFS are large, we can rely more on the survey to produce our estimates. When sample sizes are small, we can rely more on what the other data sources imply about local consumption. Using this approach, we obtained estimates of local average equivalised consumption spending for each local authority.
Well-being
To look at well-being, we regressed measures of well-being on income and local environmental amenities and demographics. Environmental amenities were measured at the Middle-Super Output AREA (MSOA) level. Taking the ratio of the estimated coefficients on income and local environmental features yielded an estimate of the increase in income needed to offset a unit increase in some local amenity. To account for the potential endogeneity of household income, we also used an instrumental variable in the form of the hourly rate of pay in the industry of the head of the household averaged across all relevant households except the household in question. We also explored estimators in terms of differences. Taking first differences in incomes, local amenities and controls allowed us to control for time-constant sources of unobserved heterogeneity in well-being.