Got them :), hope you don't mind my geek out on stats, the DDs are laughing at me for it.
2000 average weekly earnings for
Boston £308
East Midlands: £330
UK: £360
So Boston in 2000 was 7.1% lower than the rest of the East Midlands and in 2016 it is 12.37% lower on average than the rest of the East Midlands.
If it had retained the trend then wages in Boston would be 5.2% higher meaning that weekly wages would be £22.36 higher. But in order to see if that year was part of a trend or an anomaly we have to look at a few other years.
In 1997, wages in Boston were 9.6% lower than the East Midlands. In 2001 average wages were 11.2 % lower, 2002 average wages were 12.2% lower and in 2003 wages in Boston were 13.7 % lower than the rest of the East Midlands these are both prior to EU 8 accession and FOM for Eastern Europeans.
Once this occurred in 2004 wages were 14.6% lower than the rest of the East Midlands, however this follows the trend noted above. however following two years of FOM in 2006 they had fallen to being 11% lower than the rest of the East Midlands.
Average wages in the actually reduced from the previous year during 2008, but in 2009 they rose again and the gap between EM and Boston was 9.9%
Wages in Boston have increased 55% since 1997 and wages in the East Midlands have increased 59%, where are average wages in the UK have increased by 68%.
Prior to FOM between 2000 and 2003 average wages grew by 8.4%, following FOM between 2004 and 2007 wages grew by 11%., between 2008 and 2011 wages grew by 10.1% but had a decrease in 2008. Between 2012 and 2016 average wages rose by 6 %.
What does this tell us?
That Boston has always been a lower paid area than the rest of the East Midlands and that its current gap has been exceeded historically in years where the town had a lower population and a far lower % of the population were immigrants.
As a larger proportion of Boston's employees are low paid workers than is average the average pay growth since 1997 has been slightly lower than the rest of the area, but both Boston and the East Midlands are fall below the national average pay growth. Pay growth accelerated between 2004 and 2007, but grew slower in later years, which corresponds with the LSE analysis.
Overall the I think that the historic wage rate trends show that immigration has had a minimal impact on income in Boston.
It is also worth noting that Boston has extremely low unemployment, lower than the national and regional average.
www.nomisweb.co.uk/reports/lmp/la/1946157148/subreports/ashew_time_series/report.aspx?