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Identification and Inference for Synthetic Control Methods with Spillover Effects: Estimating the Economic Cost of the Sudan Split

Shosei Sakaguchi, Hayato Tagawa

arXiv 1 Aug 2024 · Econometrics

arXiv:2408.00291 · PDF · DOI · OpenAlex · Extracted main text

Abstract

The synthetic control method (SCM) is widely used for causal inference with panel data, particularly when there are few treated units. SCM assumes the stable unit treatment value assumption (SUTVA), which posits that potential outcomes are unaffected by the treatment status of other units. However, interventions often impact not only treated units but also untreated units, known as spillover effects. This study introduces a novel panel data method that extends SCM to allow for spillover effects and estimate both treatment and spillover effects. This method leverages a spatial autoregressive panel data model to account for spillover effects. We also propose Bayesian inference methods using Bayesian horseshoe priors for regularization. We apply the proposed method to two empirical studies: evaluating the effect of the California tobacco tax on consumption and estimating the economic impact of the 2011 division of Sudan on GDP per capita.

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40
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84
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Most heavily cited references

The works this paper leans on most, across its whole bibliography — not restricted to papers in our corpus. Ranked by composite intensity, which combines how often a work is mentioned, how many sections mention it, and how much of that falls in the main text rather than the appendix.

ReferenceIntensityMentionsSectionsMain text
1Abadie, Alberto and Diamond, Alexis and Hainmueller, Jens (2010) Synthetic control methods for comparative case studies: Estimating the effect of California's tobacco control program1.000237100%
2Kim, Sungjin and Lee, Clarence and Gupta, Sachin (2020) Bayesian synthetic control methods1.00053100%
3LeSage, James and Pace, Robert Kelley (2009) Introduction to Spatial Econometrics0.7373367%
4Carvalho, Carlos M and Polson, Nicholas G and Scott, James G (2010) The horseshoe estimator for sparse signals0.73732100%
5Pang, Xun and Liu, Licheng and Xu, Yiqing (2022) A Bayesian alternative to synthetic control for comparative case studies0.73732100%
6Mawejje, Joseph and McSharry, Patrick (2021) The economic cost of conflict: Evidence from South Sudan0.64422100%
7Rubin, Donald B (1978) Bayesian inference for causal effects: The role of randomization0.64422100%
8Geweke, John (2004) Getting it right: Joint distribution tests of posterior simulators0.5112250%
9Abadie, Alberto and Gardeazabal, Javier (2003) The economic costs of conflict: A case study of the Basque Country0.51121100%
10Alesina, Alberto and Spolaore, Enrico and Wacziarg, Romain (2000) Economic Integration and Political Disintegration0.51121100%

Showing the top 10 of 40 scored citations.