資安攻擊與財報可比性之關聯性研究

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姓名

戴易宸(Yi-Chen Tai) 查詢紙本館藏

畢業系所

財務金融學系

論文名稱

資安攻擊與財報可比性之關聯性研究
(The Association between Cyberattacks and Financial Statement Comparability)

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摘要(中)

過去文獻指出資安攻擊事件(cyberattacks)會影響公司的公司治理以及現金流量的波動度；而上述兩者亦在先前相關研究中被證實與公司財報可比性(financial statement comparability)有顯著的相關性。因此本研究即針對資安攻擊與財報可比性兩者之間的關聯性進行探討分析，並檢視兩者間的傳導機制。
本文利用2005年至2018年美國資安攻擊事件之資料，進行資安攻擊與財務報表可比性之關聯性探討。我們採用財報可比性的代理變數與資安事件的指標變數進行分析，並考慮相關控制變數對財報可比性的影響。實證結果顯示，資安攻擊與財報可比性的存在顯著的正向關聯，支持公司傾向透過公司治理的改善來加強財報可比性的假說。此外，兩者之間的關聯性在機構投資人持股比率較低、分析師盈餘預測離散度較低、以及媒體曝光度較高的公司中將表現更為強烈。

摘要(英)

Previous studies have shown that cyberattacks tend to affect firms’ corporate governance and cash flow volatility, both of which are also found to be highly associated with financial statement comparability. Thus, in the paper we aim to prove the direct relations between cyberattacks and financial statement comparability and further verify its underlying mechanism.
Using the samples of cyberattack events in the United States during the period from 2005 to 2018, we investigate the relations between cyberattacks and financial statement comparability. Proxy variables for financial statement comparability, indicator variables for cyberattacks, and related control variables are used in empirical analysis. The results reveals that there’s positive relation between cyberattacks and financial statement comparability. Furthermore, this relation is more pronounced for firms with lower institutional ownership, lower analysts forecast dispersion, and higher media attention.

關鍵字(中)

★ 資安攻擊
★ 財報可比性
★ 公司治理
★ 資訊安全

關鍵字(英)

★ cyberattack
★ financial statement comparability
★ corporate governance
★ cybersecurity

論文目次

中文摘要 i
ABSTRACT ii
誌謝 iii
目錄 iv
表目錄 v
圖目錄 vi
第一章緒論 1
1-1 研究背景 1
1-2 研究架構 3
第二章文獻回顧 5
2-1 資安攻擊事件 5
2-2 財務報表可比性 6
2-3 資安攻擊事件與財報可比性之關聯 8
2-4 機構投資人持股比率 9
2-5 分析師盈餘預測離散度 10
2-6 媒體關注度 11
第三章研究方法 12
3-1 資料來源與樣本期間 12
3-2 財報可比性之衡量 16
3-3 控制變數 17
3-4 研究模型 19
第四章實證結果 20
4-1 敘述統計量 20
4-2 資安攻擊事件對財報可比性影響 24
4-3 影響資安攻擊與財報可比性關係之因素 31
第五章穩健性測試 35
第六章結論 38
參考文獻 40

參考文獻

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指導教授

黃泓人(Hong-Ren Huang)

審核日期

2022-6-23

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