RDP 8604: Leading Indexes - Do They? Equation (5)

E[( Y t+k − E t ( Y t+k ))( Y t+k − E t ( Y t+k ) ) ′ ]= A 0 ϕ A ′ 0 +…+ A k−1 ϕ A ′ k−1 MathType@MTEF@5@5@+= feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaamyraiaacU facaGGOaGaamywamaaBaaaleaacaWG0bGaey4kaSIaam4AaaqabaGc cqGHsislcaWGfbWaaSbaaSqaaiaadshaaeqaaOGaaiikaiaadMfada WgaaWcbaGaamiDaiabgUcaRiaadUgaaeqaaOGaaiykaiaacMcacaGG OaGaamywamaaBaaaleaacaWG0bGaey4kaSIaam4AaaqabaGccqGHsi slcaWGfbWaaSbaaSqaaiaadshaaeqaaOGaaiikaiaadMfadaWgaaWc baGaamiDaiabgUcaRiaadUgaaeqaaOGaaiykaiqacMcagaqbaiaac2 facqGH9aqpcaWGbbWaaSbaaSqaaiaaicdaaeqaaOGaeqy1dyMabmyq ayaafaWaaSbaaSqaaiaaicdaaeqaaOGaey4kaSIaeSOjGSKaey4kaS IaamyqamaaBaaaleaacaWGRbGaeyOeI0IaaGymaaqabaGccqaHvpGz ceWGbbGbauaadaWgaaWcbaGaam4AaiabgkHiTiaaigdaaeqaaaaa@6556@