How do you put a financial value on educational opportunities that may have been lost years earlier?

In this 2001 article for APIL, Keith Carter considers how undiagnosed dyslexia and other unmet special educational needs can affect qualifications, career opportunities and eventual earnings. Rather than treating these losses as too speculative to assess, he explores how education data, occupational comparisons and labour-market evidence can provide a basis for quantifying what might otherwise have been achieved.