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Tax and benefit system
Since its foundation in the 1960s, the IFS has been studying developments in the UK's tax and social security system. This continues to be a core part of the Institute's work, making a particularly important contribution to public debate around the government's annual set pieces of the Budget and Pre-Budget Report, and the Institute's own Green Budget. Research at the IFS concentrates on describing and analysing changes and proposed changes to the tax and social security system, and in using large cross-sectional household datasets to model the impact of reforms on individuals' incomes and behaviour. Below, we present specific projects that researchers at the IFS have worked on in recent years, although the constant need to maintain the Institute's tax and benefit model means that IFS researchers are familiar with almost all areas of personal tax and social security in the UK.

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Year: 391 publications
15 December 2003
Mike Brewer, Alan Duncan, Andrew Shephard and María José Suárez
this paper uses a structural model of labour supply and programme participation to show the impact of a reform to in-work support (Working Families’ Tax Credit) on both labour supply and programme participation (or take-up).
01 December 2003
BN41
The government has a target for child poverty to fall to 3.1 million by 2004-05, measured by the number of children in households with less than 60% median income after housing costs. The latest data showed that 3.8 million children (30% of children in Britain) were in poverty in 2001-02 on this definition. To help achieve the target, increases to means-tested benefits and tax credits need to take effect in April 2004, and therefore need to be announced in the forthcoming Pre-Budget Report.
01 December 2003
Mike Brewer, María José Suárez and Ian Walker
Many people in the UK do not claim benefits to which they seem to be entitled. Amongst those of working-age, take-up rates for Family Credit.
01 December 2003
Reamonn Lydon and Ian Walker
This paper attempts to uncover the effects of a welfare-to-work programme, that acts as a wage subsidy, on wage growth by exploiting an expansion to this welfare programme in the UK.
02 November 2003
W03/21
Suman Basu, Carl Emmerson and Christine Frayne
This paper examines the corporation tax forecasting techniques used by the Institute for Fiscal Studies.
01 October 2003
BN39
On 6 October 2003, the pension credit replaced the minimum income guarantee as the principal means-tested benefit for families containing an individual aged 60 or over. This Briefing Note examines the impact of this reform.
01 June 2003
Editorial note
This is the second part of the symposium arising from a one-day conference held at the Institute for Fiscal Studies in May 2002.
01 June 2003
James Sefton and David Miles
This paper uses a simple model of how households at different points on the income distribution make decisions about saving and labour supply to illustrate some of the problems government faces in designing social security systems.
01 June 2003
Raymond Plant
The aim of this paper is to elucidate the idea of citizenship that lies behind the Labour government's welfare reforms.
01 April 2003
BN35
The child tax credit and working tax credit were introduced in April 2003. When fully operational, the child tax credit will represent the majority of government financial support for children. It is designed to simplify the system of financial support for parents, and provides support that is means-tested against family income. The working tax credit is designed to make work more financially attractive. It means that people with or without children in work and on a low income may receive extra help from the State. This Briefing Note looks at the changes that have been made and asks why the new tax credits have been introduced, how they work, the cost and distributional impact, the impact on work incentives and what levels of take-up we might expect.
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Current research
Started: 01 November 2010
Started: 28 September 2010
Started: 17 March 2010
Impact on Society
In light of Government objectives to increase environmental taxation, we investigate whether the UK tax system is becoming more or less ‘green’.
The IFS has made valuable contributions to the debate on VAT and its impact on the poor.
The IFS played a key role in the debate about who the tax and benefit changes in recent ‘Emergency Budget’ hit hardest.
Changes to the benefit system recommended by IFS researchers have made working less than 16 hours a week more attractive to benefit recipients.
The IFS played a key role in informing the public during the 2010 election campaign. Our comments on the parties’ tax plans were quoted by the party leaders in their debates.
The Mirrlees Review shows the importance IFS attaches to high quality empirical evidence in the design of tax and benefit system.
Our ERA analysis contributed to the evaluation literature and informed the Government about the validity of the experimental findings.
IFS evaluated the Pathways to Work programme. This work proved key to the policy debate about how to get disability benefit claimants in work.
Proposals by IFS researchers to simplify the benefit system and strengthen the incentives for low-skilled adults to work have attracted the attention of Iain Duncan Smith, Secretary of State for Work and Pensions.
IFS researchers found that the In-Work Credit encouraged lone parents to leave benefit more quickly but did not increase work retention.
An IFS economist advised a “Citizens Jury” on the welfare system, including basic facts and important issues about its purpose and structure.
IFS researchers develop a model of the Mexican tax system that will be used by the Mexican Government analysts.
IFS researchers and the World Bank plan to develop capacity and tools in developing countries for the comprehensive analysis of tax reforms