Abstract
In order to interpret complicated economic phenomena, a grand synthetic model is set up in which IS-LM core is kept. The grand synthetic model integrates four key variables (y, m, p, k) and three key policy rates (γ, τ, π) and introduced three economic parameters (b, s, d). In total, there are 10 equations for the 10 variables (y, m, p, k; γ, τ, π; b, s, d), except the link m = p + y, and three model parameters (α, θ, ρ) are free variables. The b, s, and d = δ, respectively, stand for big parameter, small parameter, and micro-parameter with estimated values at b~103, s~10-1, and d~10-2.