 Facts and figures about UK taxes, benefits and public spending.
Income distribution, poverty and inequality.
Analysing government fiscal forecasts and tax and spending.
Analysis of the fiscal choices an independent Scotland would face.
Case studies that give a flavour of the areas where IFS research has an impact on society.
Reforming the tax system for the 21st century.
A peer-reviewed quarterly journal publishing articles by academics and practitioners.
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In this presentation we review the significant problems for inference (as captured in the estimated standard error) that can arise in the popular "difference-in-difference" designs. These arise especially where data have a multi-level structure, and there is serial correlation in the treatment or policy variation, and in the group-level shocks. We discuss best-practice in dealing with such problems Search |
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