本研究針對 OECD 37 國 2008年至2023 年之跨國跨期資料，檢驗「國家安全」與「民主化」對貪腐程度的影響機制與相對重要性。研究以國際透明組織之貪腐指數（CPI）反向化衡量「貪腐程度」，以經濟與和平研究所之全球和平指數（GPI）操作化「國家安全」（經指標方向處理後數值愈大代表安全程度愈高），並以經濟學人智庫民主化指數（DI）衡量「民主化發展」。控制變數涵蓋經濟發展水準、失業率、教育支出與入學率、外國直接投資、全球化程度與問責指數等。方法上，採一般最小平方法（OLS）進行多模型估計，並透過替代指標、異質性分組與穩健性檢驗提升推論效度。實證結果顯示：其一，國家安全提升與民主化深化，均與較低的貪腐程度呈現顯著關聯；其二，治理品質（法治、政府效能）與教育水準對抑制貪腐具一貫且穩健之正向效果；其三，經濟開放（全球化、外資）對貪腐的影響依制度環境而異，當問責與透明度未同步提升時，其抑腐效果不顯著甚至可能轉弱。研究貢獻在於在同一比較框架下，同步量化國家安全與民主化對貪腐之影響，補足既有研究偏重經濟或單一制度變數的限制。政策意涵上，建議以「安全治理—民主鞏固—良治能力」的組合策略強化反貪成效，包含強化法治與問責、提升教育與公民能力，以及在深化經濟開放的同時完善資訊揭露與監理設計，以降低貪腐風險並增進治理韌性。

This study examines how national security and democratization shape corruption across 37 OECD countries, 2008–2023. Corruption is proxied by the reverse-coded Corruption Perceptions Index (Transparency International). National security is operationalized with a rescaled Global Peace Index (Institute for Economics & Peace; higher values = greater security), and democratization with the Economist Intelligence Unit’s Democracy Index. Controls include economic development, unemployment, education expenditure and enrollment, foreign direct investment, globalization, and accountability. Multiple ordinary least squares specifications are estimated, with robustness checks using alternative indicators and heterogeneity analyses. Results indicate that higher national security and deeper democratization are each significantly associated with lower corruption. Governance quality—rule of law and government effectiveness—and education consistently reduce corruption. By contrast, the effects of openness (globalization, FDI) depend on institutional context; without parallel gains in accountability and transparency, openness does not reliably curb corruption. The study jointly quantifies security and democratization within a unified OECD framework and recommends coordinated policies linking security governance, democratic consolidation, and state capacity to mitigate corruption risks.

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