To ask the Chancellor of the Exchequer what estimate he has made of the effect of immigration on (a) gross domestic product and (b) per capita gross domestic product since 1997.
Migration has added around 0.5 per cent. per annum to the working age population between 1997 and 2006, stimulating growth in total output. Average output growth over this period was 2.7 per cent. and migration is estimated to have contributed around 15-20 per cent. of this.
The direct impact of immigration on gross domestic product per capita has been small but broadly positive.
The impact of immigration on the economy is discussed in more detail in a cross-departmental report(1) in sections 3.3 and 3.4.