Yet a January 2010 Impact Study by the federal Department of Health and Human Services that compared Head Start participants to a control group found that virtually all gains in vocabulary, math, and other skills realized by Head Start children had dissipated by the time the students completed the third grade.
Although it appeals both to Mr Lilley and to Daniel Finkelstein, who heads the party's research office, there are other influential Tories who fear that too big a shift in ideas or vocabulary will destroy what little support the party has retained.