「經濟穩定度」是指國家總體經濟在面對內、外部衝擊時，維持物價、就業及金融體系基本穩定的能力與狀態。其目的在於確保市場環境、市場信心與實現經濟增長。本研究以OECD 38個成員國的作為研究樣本，從國家安全與民主制度作為切入點，並加入通膨率、失業率、政府效率、教育水準與國外直接投資等其他因素，蒐集2007 至 2017 年間國家樣本的現況資料，並採用多元迴歸模型(OLS)進行基礎迴歸分析後續透過隨機效應模型 (Random Effects Model, RE)進行整體估計，以探討國家經濟穩定度的決定性因素。實證結果顯示，「國家安全指數」、「政府效率」、「教育水準」及「國外直接投資」對經濟穩定度具有正向顯著影響；而「高通膨」與「高失業率」則對經濟穩定度具有負向顯著影響；另「民主化程度」的對經濟穩定的解釋能力雖為正向，但影響較不顯著；研究結果支持已開發國家長期經濟穩定的核心條件為「制度性因素」，並為政策制定者提出具體建議：強化安全治理與深化民主法治，是維持國家長期經濟穩定度與提升發展的根本路徑。

"Economic stability" refers to the capacity and state of a nation's macroeconomy to maintain fundamental stability in price levels, employment, and the financial system amidst internal and external shocks. Its objective is to ensure a favorable market environment, sustain market confidence, and realize economic growth.
Using the 38 OECD member countries as the research sample, this study examines economic stability through the lens of national security and democratic institutions. The analysis incorporates additional variables, including inflation rate, unemployment rate, government effectiveness, educational attainment, and Foreign Direct Investment (FDI).
Data collected spans from 2007 to 2017. The study employs Ordinary Least Squares (OLS) for preliminary regression analysis, followed by the Random Effects (RE) model for
comprehensive estimation to identify the determinants of national economic stability.
Empirical results indicate that the "National Security Index," "Government Effectiveness," "Educational Attainment," and "FDI" have a significantly positive impact
on economic stability. Conversely, high inflation and high unemployment exert a significantly negative impact. Furthermore, while the "degree of democratization" shows a
positive correlation with economic stability, its statistical significance is relatively low.
The findings support the premise that "institutional factors" are the core conditions
for long-term economic stability in developed nations. Consequently, this study offers concrete recommendations for policymakers: strengthening security governance and deepening the democratic rule of law are the fundamental pathways to maintaining long-term national economic stability and fostering development.

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