手法を比較

	モンテカルロシミュレーションのための分散削減技術	確率微分方程式 (SDE)
分野	シミュレーション	シミュレーション
系統	Process / pipeline	Process / pipeline
提唱年	1950s–1980s (technique family)	1944 (theory); 1992 (numerical framework)
提唱者	Hammersley & Morton (antithetic variates, 1956); Lavenberg & Welch (control variates, 1981); importance sampling roots in Kahn & Marshall (1953)	Kiyosi Itô (Itô calculus, 1944); Peter Kloeden & Eckhard Platen (numerical methods, 1992)
種類	Simulation variance-reduction technique family	Continuous-time stochastic process model
原典	Ross, S.M. (2012). Simulation (5th ed.). Academic Press. ISBN: 978-0124158252	Øksendal, B. (2003). Stochastic Differential Equations: An Introduction with Applications (6th ed.). Springer.
別名	antithetic variates, control variates, importance sampling, stratified sampling MC	SDE, Itô equations, Stokastik Diferansiyel Denklemler (SDE)
関連	4	4
概要	Variance reduction techniques are a family of methods that improve the efficiency of Monte Carlo simulation by achieving the same estimation accuracy with fewer random draws. Developed incrementally from the 1950s onward — with antithetic variates attributed to Hammersley and Morton, control variates formalised by Lavenberg and Welch, and importance sampling rooted in Kahn and Marshall — the family includes antithetic variates (AV), control variates (CV), importance sampling (IS), and stratification, each exploiting a different structural property of the target quantity to lower estimator variance without introducing bias.	Stochastic differential equations (SDEs) are differential equation models that combine a deterministic drift term — governing the average tendency of a system — with a stochastic diffusion term driven by a Wiener process (Brownian motion). Pioneered through Itô calculus by Kiyosi Itô in 1944 and given a comprehensive numerical treatment by Kloeden and Platen in 1992, SDEs are the standard modelling language for continuous-time systems subject to random noise, including financial asset prices, population dynamics, and physical processes.