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Home Publications Frictions and taxpayer responses: evidence from bunching at personal tax thresholds

Frictions and taxpayer responses: evidence from bunching at personal tax thresholds

Journal article | International Tax and Public Finance

We exploit kinks and notches in the UK personal tax schedule over a 40-year period to investigate how taxpayers respond to income tax and social security contributions. At kinks, where the marginal rate rises, we find bunching by company owner-managers and the self-employed, but not those with only employment income. Responses to notches, where the average rate rises, provide compelling evidence that this is because most employees face substantial frictions: fewer than a quarter bunch even where doing so would increase both consumption and leisure. We develop a new approach for identifying selection in who responds and for decomposing responses into hours and wage components. We find that those employees who do bunch at notches are almost exclusively part-time workers, but tend to have lower wages and work more hours than those part-time workers who do not bunch.

 

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Journal article | Journal of Public Economics
We examine the effects of employee and employer social security contributions (SSCs) on labor cost, hours of work, and labor cost per hour in the UK.We find that reductions in marginal rates of employee – but not employer – SSCs have positive effects on labor cost that operate through hours of ...