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The Effect of Board Structure on Firm Disclosure and Behavior: A Case Study of Korea and a Comparison of Research Designs

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  • Bernard Black
  • Woochan Kim
  • Julia Nasev

Abstract

We exploit a large legal shock to the board structure of Korean firms, using a strong research design—combined difference‐in‐differences and regression discontinuity—to study whether this board structure change affects firm financial reporting (disclosure, MD&A length, and abnormal accruals), investment and growth (sales growth and capital expenditures), and firm value (proxied by Tobin's q). We also compare results from the annual DiD/RD design to those from simpler panel and “causal” methods, and assess how results vary across methods. We find robust evidence across methods that the shock predicts improved scores on a Disclosure Subindex, confirm prior findings of an increase in Tobin's q, and find some evidence for a drop in sales growth, but no convincing evidence of significant change for other outcomes. By comparing results across methods, we illustrate how using multiple causal designs can provide insight into and evidence of robustness not available from a single design, as well as case study evidence that panel methods, simple DiD, and its close cousin, shock‐based IV, can produce apparent false positives.

Suggested Citation

  • Bernard Black & Woochan Kim & Julia Nasev, 2021. "The Effect of Board Structure on Firm Disclosure and Behavior: A Case Study of Korea and a Comparison of Research Designs," Journal of Empirical Legal Studies, John Wiley & Sons, vol. 18(2), pages 328-376, June.
  • Handle: RePEc:wly:empleg:v:18:y:2021:i:2:p:328-376
    DOI: 10.1111/jels.12280
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    1. Yang Chen & Jian Xu, 2022. "The Role of Supervisory Board Heterogeneity on Corporate Irregularity: New Insights and Management Opportunities," Sustainability, MDPI, vol. 14(20), pages 1-16, October.

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