There are four key themes to my work:
Cumulative impact assessment of tax and welfare reforms
The period following the May 2010 general election witnessed significant changes to the tax and welfare system in the UK, as the Conservative/Liberal Democrat Coalition Government introduced such changes as: reducing the value of social security payments in real terms for working age adults and families; ‘triple locking’ the state pension; raising the real terms value of the income tax personal allowance, and increasing VAT to 20%. I have co-authored a series of papers which exploit the microsimulation capabilities of the Landman Economics Tax-Transfer Model (TTM) to model the cumulative impact of tax and welfare reforms between 2010 and 2015 (Reed and Portes, 2014) and also the subsequent impact of reforms by the Conservative governments in the second half of the 2010s (Portes and Reed 2018, Reed 2020).
These studies feature distributional analysis across a whole range of individual, family and household characteristics including household net income decile, age of adults in the household, number of children, disability status or adults or children in the household, ethnicity of household members, gender of adults in the household. The studies also present intersectional analysis across two or three different characteristics at once (as far as the sample sizes of the Family Resources Survey and Living Costs and Food Survey datasets used in the analysis allow). I have also carried out impact assessments for countries within the UK, such as in Scotland (Reed and Portes 2019a) and Northern Ireland (Reed and Portes 2019b). Analysis was produced at household, benefit unit and (in Portes and Reed 2018) individual level; modelling impacts at the individual level requires assumptions about how benefit payments are allocated between partners in couple benefit units. The analysis allows for partial take-up of means-tested transfers. The phased introduction of Universal Credit from 2013 onwards, replacing means-tested benefits and tax credits for working-age households, presents particular challenges in terms of forecasting take-up as well as modelling transitional relief for claimants migrated onto the new system.
Distributional impacts of in-kind public spending changes
The 2010s were a period of real-terms reduction in spending on most public services as part of the government’s austerity agenda (with the exception of the NHS, which saw real-terms increases although these were still relatively modest compared to previous decades of health spending). I developed the Landman Economics public spending model to analyse the distributional impacts of changes to in-kind public spending on services such as health, social care, early years provision, schools, higher education, social housing and public transport. The model combines information from HM Treasury’s Public Expenditure Statistical Analyses on aggregate spending by functional category with data on individuals’ and households’ use of public services from household survey datasets (in particular the Understanding Society longitudinal survey). Combining these two data sources allows the pattern of spending on each public service to be analysed according to household net income and a range of other characteristics. Portes and Reed (2018) presents a range of different distributional analyses for England, Scotland and Wales, while Reed (2017) focuses on the impact of reforms by gender of adults. As well as modelling historical changes in spending in different countries of the UK, this approach has also been used to simulate the effect of expanding universal publicly funded in-kind provision to services such as broadband communications and local bus services (Reed, Portes and Percy, 2017).
Distributional and fiscal impacts of Universal Basic Income
In addition to modelling the impact of historical changes to net income as a result of tax and benefit reforms, the Landman Economics Tax-Transfer Model can be used to model the distributional impacts of, and provide aggregate costings for, reforms to the tax and/or welfare systems that do not currently exist in the system. Universal Basic Income – an unconditional, non-means-tested payment to every individual citizen in the UK – is one such policy which I have modelled extensively in the past ten years. Initially my focus was on static microsimulation of the costs and distributional impacts of a scheme that would replace supplement the existing means-tested social security system with relatively small top-up payments to adults and children (Lansley and Reed 2016). More recently, I have modelled schemes that would replace substantial elements of the current benefit system (e.g. Jobseekers Allowance / adult Universal Credit payments, Child Benefit and the State Pension) as well as providing a realistic time path to full implementation of such a scheme (Lansley and Reed 2019). I have also shown that a much more extensive (and expensive, in terms of gross costs) scheme that paid individuals sufficient amounts to meet the Joseph Rowntree Foundation’s Minimum Income Standard level could be funded by increased income tax rates and reforms to the personal tax system (Reed et al, 2023).
Forecasting poverty and inequality using microsimulation techniques
The Landman Economics Tax Transfer Model can produce results for the impact of changes to tax and benefits on summary distributional measures such as poverty (e.g. the proportion of households whose net incomes are below 60% of median equivalised net income) or inequality (e.g. the Gini Coefficient), but it can also be used to forecast future levels of poverty and inequality when combined with assumptions about growth in wages and other market incomes, employment rates for different segments of the population, future tax-benefit policies, etc. Reed and Portes (2014b) analysed whether the UK Government would be able to meet its 2020 targets for child poverty by relying on growth in employment rates for working-age adults alone, or whether increases in real-terms social security support for families would be required. Reed and Stark (2018) forecast trends in child poverty for Scotland up to the early 2030s under a range of different assumptions regarding income and employment growth. Harrop and Reed (2015) model the outlook for UK inequality and poverty in 2030 under a range of different assumptions about the generosity of welfare policy after 2015.