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	Richardson Arms Race Model	Militarized Interstate Dispute Analysis
分野	International Relations	International Relations
系統	MCDM	Process / pipeline
提唱年	1960	1996
提唱者	Lewis Fry Richardson	Daniel Jones, Stuart Bremer & J. David Singer (Correlates of War project)
種類	Coupled linear differential-equation dynamic model	Coding and statistical analysis of interstate militarized confrontations
原典	Richardson, L. F. (1960). Arms and Insecurity: A Mathematical Study of the Causes and Origins of War (N. Rashevsky & E. Trucco, Eds.). Pittsburgh: Boxwood Press; Chicago: Quadrangle Books.	Jones, D. M., Bremer, S. A., & Singer, J. D. (1996). Militarized interstate disputes, 1816–1992: Rationale, coding rules, and empirical patterns. Conflict Management and Peace Science, 15(2), 163–213.
別名	Richardson Arms Race Equations, Arms Race Dynamics Model, Action-Reaction Arms Model, Richardson Model of Arms Competition	MID Analysis, Militarized Dispute Coding, Correlates of War Dispute Analysis, Dyadic Conflict Onset Analysis
関連	3	3
概要	The Richardson arms race model, set out by Lewis Fry Richardson in Arms and Insecurity (1960), is a pair of coupled differential equations describing how two rival states adjust their armaments over time. Each state's rate of arming rises with the rival's level of arms (action–reaction fear), falls with the burden of its own existing arms (fatigue or economic constraint), and is shifted by underlying grievance or goodwill. Analyzing the system reveals whether an arms race converges to a stable equilibrium or spirals upward without bound, making it the foundational mathematical model of arms competition.	Militarized interstate dispute (MID) analysis is the coding and quantitative study of confrontations in which one state threatens, displays, or uses military force against another. Built on the Correlates of War project's MID dataset and the coding rules codified by Jones, Bremer, and Singer (1996), it provides the standard observational measure of interstate conflict short of and including war, structured as dyad-years so that the onset, escalation, and outcomes of disputes can be modeled statistically across two centuries of the international system.