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176 results:
… firm performance using a difference-in-difference approach…
… outcomes using a difference-in-differences…
… the value of debate and difference.
… increase understanding of differences in sentencing among…
… health services – make a difference to retention rates, and…
… the theme of education between December 2011 and March…
… is likely to be some difference between different…
… a shining example of the difference this investment is…
… Insight describes: The differences between children…
… was adjusted for differences in age, sex, area of…
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