蒙古位於亞洲內陸，夾處於中、俄兩大強國之間的戰略位置，使其曾長期被兩大強鄰視為領土的邊疆(frontier)。隨著 1991 年蘇聯瓦解，使近代蒙古第一次擁有完整主權。此後，蒙古的對外政策定調為「不結盟、等距離、全方位」，在「第三鄰國」戰略操作及地理條件基礎下，以平衡為原則，執行外交策略。誠然，蒙古如何在兩大強鄰之間求取平衡的生存之道，建構出獨立與靈活的外交及經貿空間，是蒙古確保國家安全的一大課題，也是本文的研究目的。  ..

Mongolia, with its strategic location between China and Russia in the inner Asia, is seen by its powerful neighbors for hundreds of years as a frontier. In 1991, modern Mongolia obtained complete sovereignty for the first time after the disruption of USSR, Hereafter, its foreign policy was principled upon “independence, non-alignment, multi-pillars”. Under the “third neighbor” strategy, Mongolia uses the opportunities endowed from its geography to balance neighboring threats, ensure its national securi..

新現實主義針對外部平衡提出了許多的模型，但卻未能說明國家為何，以及如何在不同類型的內部平衡間進行選擇，以回應外在的壓力。要解釋一國在軍事政策上的變化，必須以一種結合體系與單元雙層次變數的理論進行分析，而這種理論的基礎即是目前方興未艾的新古典現實主義。不過，新古典現實主義雖注意到了單元層次的重要性，卻仍忽略了國家行為邏輯的雙重性，亦即，國家除了權衡利害關係(後果性邏輯)以做出決策外，在此過程中，也會受到文化因素(適當性邏輯)的影響。本研究即是希望能夠透過理論綜..

There are many models of external balancing based on neo-realism. Nevertheless, not all can interpret why and how states choose among different types of internal balancing strategies to response the extrinsic stress. To understand the change of a state’s military policy, neoclassical realism integrates the system-level and unit-level variables. However, it still ignores the dual nature of the logic of state’s action, namely, besides interest, the influence of culture. Hence, a new “secure arming” model..