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Better Bunching, Nicer Notching

Marinho Bertanha, Andrew H. McCallum and Nathan Seegert

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Abstract: We study the bunching identification strategy for an elasticity parameter that summarizes agents' response to changes in slope (kink) or intercept (notch) of a schedule of incentives. A notch identifies the elasticity but a kink does not, when the distribution of agents is fully flexible. We propose new non-parametric and semi-parametric identification assumptions on the distribution of agents that are weaker than assumptions currently made in the literature. We revisit the original empirical application of the bunching estimator and find that our weaker identification assumptions result in meaningfully different estimates. We provide the Stata package "bunching" to implement our procedures.

Date: 2021-01
New Economics Papers: this item is included in nep-ecm
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Working Paper: Better Bunching, Nicer Notching (2021) Downloads
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