1. The careful qualifications in the original research paper have been omitted. The year chosen was one of public sector surplus which exaggerated the effect. The cost of the extra infrastructure needed for this addition to our population has been ignored. For example, the impact on England 's housing could amount to an extra requirement of about one million houses over 25 years. A much more significant measure is the impact on Gross Domestic Product (GDP) per head. The Economist magazine estimated this at 1/8% per head per year. A major American study put the annual contribution of broadly similar levels of immigration to GDP at 1/10 of 1% but made no allowance for the costs of congestion.
The missing qualifications
3. The claim is taken from a Home Office research paper entitled
Population in the UK : Fiscal effects " issued in 2002 as Research Development and Statistics (RDS) occasional paper number 77. In launching the paper, Barbara Roche, then Minister for Immigration, said Last September I called for an honest and open debate about the positive contribution (sic) migration could play in the economic and social life of the country. Civil servants appear to have obliged. The claim appears in paragraph one of the Executive Summary although it is described as an estimate derived from "a tentative original analysis ".
4. The body of the paper is even more cautious. It notes (page 3) that "empirical estimates of the fiscal effect are difficult to obtain ". It continues (page 4) that they are "not only conditional on the period in which they are calculated but also on the country's position in the business cycle." It goes on "these sensitivities are apparent in the inconsistency between the existing empirical results. These are generally ambiguous, and in some cases contradictory". It mentions several studies in the US and Germany which have found the overall fiscal effect to be negative. When the paper returns to the point again (page 11) it notes that "the tentative nature of this estimate must again be emphasised, as well as the fact that the aggregate figures mask variation in outcomes across different migrant groups".
5. On the next page it becomes a little more confident "although the results provide only a rudimentary estimate of the magnitude of the effect, we can be fairly confident that the direction of this effect is positivealthough the figure itself needs to be treated with caution."Public sector surplus
8. As regards housing, which has been calculated in a similar manner, the paper recognises that migrants tend to live disproportionately in the South East (in fact seventy five per cent settle there) so their share of housing benefit may be higher per head than that of the UK born population.  The paper makes no allowance for this. Still less does it make allowance for the additional housing and infrastructure that will be necessary for new immigrants. A separate Migrationwatch paper "The impact of immigration of England's housing" estimates that, if net immigration continues at a level of about 170,000 a year, an extra 1.1 million houses will be required by 2021 just to accommodate immigrants - over and above the present Prescott plans.
9. There will also be significant extra costs in the transport, water and other environmental fields. A recent paper by the No 10 Strategy Unit stated that the inflow of overseas migrants to London had doubled in a decade to over 200,000 a year. The outflow of people to the rest of the UK had risen to 230,000 a year. As a result, they predicted that the number of commuters to London would grow by 10 20% by 2010. The diversity of immigration
12. there is also evidence that foreign immigration into the South of the UK deters migration by nationals from the North, Wales and Scotland into the South.  As a result, people living in the periphery of the UK who would have got jobs in the South remain unemployed at home. Thus foreign immigration to the South (the destination of 75% of international migrants) leads indirectly to unemployment (or low wages) in the North, Scotland and Wales . Indeed, Britain 's top labour economist, Professor Richard Layard of LSE, wrote in a letter to the Financial Times ( 30 May 2002 ):
"There is a huge amount of evidence that any increase in the number of unskilled workers lowers unskilled wages and increases the unskilled unemployment rate. If we are concerned about fairness, we ought not to ignore these facts. Employers gain from unskilled immigration. But the unskilled do not.
13. The fiscal effect of immigration should be considered over the life cycle of immigrants. At present their age structure is significantly lower than that of the population as a whole. This reduces the cost of their pensions for the time being but they will have to be paid for eventually.
16. No mention is made of personal remittances, Britain had a deficit of £3.4 bn in 2001. Much of this was money sent home by immigrants.
17. The fiscal impact is not the only measure of the effect of immigration, nor is it the best. The overall impact is reflected in the effect on Gross Domestic Product (GDP). The Economist magazine (27 June 02) assessed this as follows:
"The benefits immigration produces are unlikely to be very large. The increase in GDP per head will be smaller than in overall GDP...
Most economists agree that there will be modest gains. On the whole the economic impact of immigration is broadly neutral to mildly positive,' says John Salt of the migration research unit at University College London. The net gains are very modest,' says Richard Freeman, co-director of the LSE's Centre for Economic Performance and a member of the National Research Council (NRC) panel that reported in 1997 on the impact of immigration into the United States. The main reason is that Britain is already a very open trading economy whose imports are worth almost thirty per cent of GDP. This tempers the potential impact of immigration since imports, in effect, embody the work of foreigners who stay put.
"The government is right to insist that there are economic benefits to immigration, but they are not huge, or neutral."
18. They are certainly not huge. The NRC paper referred to above was a major study which concluded that Immigration benefits the US economy overall.and may be adding as much as $10 bn to the economy every year. As US GDP is about $10 trillion, this amounts to approximately 1/10 of 1%. Immigration to the US in 1997 was of the same order of magnitude as current levels of immigration to the UK , making some allowance for illegal immigration in both cases. However, the study made no allowance for the costs of congestion. These are even more important in Britain which is twelve times as crowded as The US. Taking these into account it is unlikely that there is any net benefit to Britain from the large scale immigration now set in train.
5 January, 2004