21世紀の統計科学 <Vol. III>
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- えりか しろみず
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1 21 III HP, ( ), 1 tatsuya@e.u-tokyo.ac.jp 63
2 1 (Linear Mixed Model, LMM) (Best Linear Unbiased Predictor, BLUP) C.R. Henderson 50 LMM (Generalized Linear Mixed Model, GLMM) LMM LMM (Empirical Best Linear Unbiased Predictor, EBLUP) LMM LMM LMM 64
3 EBLUP EBLUP LMM 2 LMM BLUP 3 EBLUP 4 LMM LMM GLMM LMM GLMM (1992), McCulloch and Searle (2001), McCulloch (2003), (2007), Searle, Casella and McCulloch (1992), Demidenko (2004), Rao (2003) [1]. Battese, Harter and Fuller (1988) k ( ) k 250h (segment) n i i j y ij, LANDSAT, 0.45h 65
4 (picture element, ), k i j, x 1ij, x 2ij y i (x 1ij, x 2ij ) y ij = x ijβ + u ij, i = 1,..., k, j = 1,..., n i x ij = (1, x 1ij, x 2ij ), β = (β 0, β 1, β 2 ) x ijβ = β 0 + x 1ij β 1 + x 2ij β 2 u ij y ij x ij v i e ij u ij = v i + e ij (2.1) v i v i v i v i v i, e ij v i N (0, σ 2 v), e ij N (0, σ 2 e) y ij = x ijβ + v i + e ij, i = 1,..., k, j = 1,..., n i (2.2) σv, 2 σe 2 σv 2 σ2 e β (2.2) (LMM) y ij (Variance Component Model) (2.2) (Nested Error Regression Model) [2]. x ij, β 3 1 p 1 66
5 y i = y i1., y = y 1., x i = x i1. y ini, X = x 1. y k, β = β 0. x in i x k β p 1, e y e i = (e i1,..., e ini ), e = (e 1,..., e k ), 1 n i 1 j ni block diag( ) Z = block diag(j n1,..., j nk ) v = (v 1,..., v k ) (2.2) N = k i=1 n i y =Xβ + Zv + e, (2.3) v N (0, σ 2 vi k ), e N (0, σ 2 ei N ) y i Cov (y i ) = Σ i (σ 2 e, σ 2 v) = σ 2 ei ni + σ 2 vj ni I ni n i n i, J ni = j ni j n i 1 n i n i y Cov (y) = Σ(σ 2 e, σ 2 v) = block diag(σ 1 (σ 2 e, σ 2 v),..., Σ k (σ 2 e, σ 2 v)) v i Cov (y i ) = σei 2 ni y i σei 2 ni + σvj 2 ni (MCMC) 67
6 [3]. (2.3) y =Xβ + Zv + e, (2.4) v N q (0, G), e N N (0, R) y N 1 X N p Z N q y Cov (y) = Σ = R + ZGZ (2.5) G, R α = (α 1,..., α m ) Σ = Σ(α) 2.2 (BLUP) [1] BLUP. (2.4) β v v G, R v y (BLUP) v β β Henderson (1950) ( ) ( ) X R 1 X Z R 1 X X R 1 Z Z R 1 Z + G 1 ) ( β v = X R 1 y Z R 1 y (2.6) β = (X Σ 1 X) X Σ 1 y, v = GZ Σ 1 (y X β) (2.7) (X Σ 1 X) X X Σ 1 X β β 2 (GLS) a R p, b R q µ = a β + b v BLUP µ = a β + b GZ Σ 1 (y X β) (2.8) 68
7 (2.6) (2.7) (2.6) 2 Z R 1 X β + (Z R 1 Z + G 1 ) v = Z R 1 y v = (Z R 1 Z + G 1 ) 1 Z R 1 (y Xβ) (2.9) (Z R 1 Z + G 1 ) 1 Z R 1 (Z R 1 Z + G 1 ) 1 Z R 1 =GZ R 1 G { (Z R 1 Z + G 1 ) G 1} (Z R 1 Z + G 1 ) 1 Z R 1 =GZ R 1 GZ R 1 Z(Z R 1 Z + G 1 ) 1 Z R 1 =GZ { R 1 R 1 Z(G 1 + Z R 1 Z) 1 Z R 1} =GZ Σ 1 Σ 1 = (ZGZ + R) 1 = R 1 R 1 Z(G 1 + Z R 1 Z) 1 Z R 1 (2.10) (2.9) (2.7) v v (2.6) 1 X R 1 X β + X R 1 Z v = X R 1 y X R 1 X β + X R 1 ZGZ Σ 1 (y X β) = X R 1 y X R 1 (Σ ZGZ )Σ 1 X β = X R 1 (Σ ZGZ )Σ 1 y Σ = ZGZ + R R 1 (Σ ZGZ ) = I, X Σ 1 X β = X Σ 1 y (2.7) β [2]. (2.6) y v G 1/2 R 1/2 { ( exp 1 2 v y Xβ Zv ) ( G R 1 ) ( v y Xβ Zv )} 69
8 exp{ } ( 2) h(β, v) = v G 1 v + (y Xβ Zv) R 1 (y Xβ Zv) β v β, v h(β, v) β h(β, v) v = 2X R 1 (y Xβ Zv), =2G 1 v 2Z R 1 (y Xβ Zv), h(β, v)/ β = 0, h(β, v)/ v = 0 (2.6) 1 y v (y, v) ( ) Σ ZG Cov (y, v) = GZ (2.11) G y v E[v y] = GZ Σ 1 (y Xβ),, y v ( v y N q GZ Σ 1 (y Xβ), G GZ Σ 1 ZG ) (2.10) y y N N (Xβ, Σ) { Σ 1/2 exp 1 } 2 (y Xβ) Σ 1 (y Xβ) (2.12) β 2 β v GZ Σ 1 (y Xβ) β GZ Σ 1 (y X β) v 70
9 2 (2.11) EM [3] BLUP. 2.1 (2.2), µ i = x iβ + v i BLUP x i = n i j=1 x ij/n i G(σ 2 v) = σ 2 vi k, Σ i (σ 2 e, σ 2 v) = σ 2 ei ni + σ 2 vj ni, Σ(σ 2 e, σ 2 v) = block diag(σ 1 (σ 2 e, σ 2 v),..., Σ k (σ 2 e, σ 2 v)) Σ 1 i = 1 σ 2 e ( I ni ) σv 2 J σe 2 + n i σv 2 ni θ = σ 2 v/σ 2 e µ i BLUP µ i (θ) (2.8) µ i (θ) = x i β(θ) + θn { } i y 1 + θn i x i β(θ) i (2.13) y i = n i j=1 y ij β GLS { k ( β(θ) = xi x i n2 i θ 1 + n i θ x ) } ix 1 i i=1 k i=1 ( xi y i n iθ 1 + n i θ x iy i ) 2.3 (2.4) 71
10 (2.2) µ i = x iβ + v i y i n i 1 5 (2.13) BLUP µ i (θ) y i x i β(θ) y i n i y i x i β(θ) y i BLUP n i θ y i x i β(θ) n i BLUP BLUP [1]. v i β = 0 µ i y i v i (y i, v i ) ( ) σv 2 + σ 2 Cov (y i, v i ) = e/n i σv 2 y i v i E[v i y i ] = θn i (1 + θn i ) 1 (y i x iβ) y i x iβ y i [2]. (2.2) y i E[y i ] = x iβ i β β y 1,..., y k β(θ) y i σ 2 v σ 2 v 72
11 Efron and Morris (1975) 2.4 (EBLUP) [1] (ML) (REML) (2.4) G, R α = (α 1,..., α m ) Σ(α) = R(α) + ZG(α)Z BLUP (2.8) µ(α) = a β(α)+b G(α)Z {Σ(α)} 1 {y X β(α)} α α µ( α) (EBLUP) α (Maximum Likelihood, ML) (Restricted Maximum Likelihood, REML) y (2.12) y N N (Xβ, Σ(α)) ML β GLS β(α) α ML log Σ(α) + (y X β(α)) Σ(α) 1 (y X β(α)) X r K K X = 0 N (N r) K y N N r (0, K Σ(α)K) REML log K Σ(α)K + y K(K Σ(α)K) 1 K y REML P (α) = Σ(α) 1 Σ(α) 1 X { X Σ(α) 1 X } X Σ(α) 1 y P (α)y =(y X β(α)) Σ(α) 1 (y X β(α)), P (α) =K(K Σ(α)K) 1 K ( / α i ) log Σ =tr (Σ 1 Σ/ α i ), P / α i = P ( Σ/ α i )P, ( / α i ) log K ΣK =tr (P Σ/ α i ) 73
12 ML REML ( ) 1 Σ(α) [ML] tr Σ(α) = y P (α) Σ(α) P (α)y (2.14) α i α ( i [REML] tr P (α) Σ(α) ) = y P (α) Σ(α) P (α)y (2.15) α i α i y P (α){ Σ(α)/ α i }P (α)y =(y X β(α)) Σ(α) 1 { Σ(α)/ α i }Σ(α) 1 (y X β(α)) = (y X β(α)) { Σ(α) 1 / α i }(y X β(α)) ML REML McCulloch and Searle (2001) 6.10 REML ML REML 3.1 [2]. ML, REML (2.14), (2.15) (2.2) n 1,..., n k σ 2 e ˆσ 2UB e = S 1 N k p + λ, S 1 = k n i } 2 {(y ij y i ) (x ij x i ) β1 i=1 (2.16) p λ k ni i=1 j=1 (x ij x i )(x ij x i ) (2.2) λ = 1, λ = 0 β 1 k ni i=1 j=1 {(y ij y i ) (x ij x i ) β} 2 β y 1,..., y k ˆσ e 2UB y i N (x iβ, σe/n 2 i + σv), 2 i = 1,..., k, σv 2 III β 0 = (X X) 1 X y S = (y X β 0 ) (y X β 0 ) N = k i=1 n i, N = N tr (X X) 1 k i=1 n2 i x i x i S E[S] = (N p)σ2 e + N σv 2 σv 2 j=1 ˆσ 2UB v = N 1 {S (N p)ˆσ e 2UB } 74
13 σv 2 ˆσ2UB v Kubokawa (2000) σe, 2 σv 2 θ = σv/σ 2 e 2 { 1 { S ˆθ = max N ˆσ e 2UB (N p) }, 1 } k 2/3 (2.17) ˆθ (2.13) EBLUP µ i (ˆθ) EBLUP EBLUP EBLUP EBLUP 3.1 Fay and Herriot (1979) y i = x iβ + v i + e i, i = 1,..., k, (3.1) e i e i N (0, σe/n 2 i ) (2.2) Fay-Herriot σe 2 σe 2 (2.2) y i = n i j=1 y ij/n i, x i = n i j=1 x ij/n i y i, x i 75
14 y = (y 1,..., y k ), X = (x 1,..., x k ), e = (e 1,..., e k ) y =Xβ + v + e, (3.2) v N (0, σ 2 vi k ), e N (0, D) D D = diag (σ 2 e/n 1,..., σ 2 e/n k ) (3.1) σ 2 v θ = σ2 v/σ 2 e (y 1,..., y k ) θ ˆθ = ˆθ(y 1,..., y k ) µ i = x iβ + v i EBLUP (2.13) ˆθ µ i (ˆθ) = y i ˆγ i (ȳ i x i β(ˆθ)), ˆγ i = γ i (ˆθ) = (1 + n iˆθ) 1 (3.3) β GLS ( k β(θ) = i=1 n i x i x ) 1 k i 1 + n i θ i=1 n i x i y i 1 + n i θ (3.4) θ ML, REML (2.14), (2.15) [ML] [REML] σ 2 e σ 2 e k i=1 k i=1 n i k 1 + n i θ = i=1 n i 1 + n i θ σ2 etr = n 2 i {y i x i β(θ)} 2 ( k i=1 (1 + n i θ) 2 n i x i x ) 1 k i n 2 i x i x i 1 + n i θ i=1 (1 + n i θ) 2 k n 2 i {y i x i β(θ)} 2 i=1 (1 + n i θ) 2 0 ˆθ ML, ˆθ REML Fay and Herriot (1979) [FH] σ 2 e(k p) = k n i {y i x i β(θ)} 2 i=1 1 + n i θ 76
15 ˆθ F H β 2 = ( k j=1 n jx j x j) 1 k j=1 n jx j y j S 2 = k i=1 n i(y i x i β 2 ) 2 (2.16) [TR] { 1 {S ˆθT R 2 = max (k p) } 1 }, n σe 2 k 2/3 n = N tr ( k n i x i x i) 1 i=1 k n 2 i x i x i n 1 = = n k = n θ ML n 1 max{n k i=1 {y i x i β(θ)} 2 /(kσe) 2 1, 0}, REML n 1 max{n k i=1 {y i x i β(θ)} 2 /((k p)σe) 2 1, 0} REML FH REML ˆθ T R i=1 3.2 EBLUP EBLUP EBLUP µ i = x iβ + v i M i (θ, µ i (ˆθ)) = E [{ µ i (ˆθ) µ i } 2 ] /σ 2 e (3.5) (Mean Squared Error, MSE) MSE EBLUP y i N (x iβ, σ 2 e/n i + σ 2 v) Stein EBLUP MSE (2007) Datta, Kubokawa, Rao and Molina (2011) MSE MSE n i k k ˆθ 77
16 Bias θ (ˆθ) = E[ˆθ θ], V ar θ (ˆθ) = E[(ˆθ E[ˆθ]) 2 ] Bias θ (ˆθ) = O p (k 1 ) ˆθ ML, REML, FH, TR g 1i (θ) =n 1 i n 1 i γ i (θ), { k g 2i (θ) = {γ i (θ)} 2 x i j=1 g 3i (θ) =n i {γ i (θ)} 3 V ar θ (ˆθ), γ j n j x j x j} 1xi, EBLUP MSE k M i (θ, µ i (ˆθ)) = g 1i (θ) + g 2i (θ) + g 3i (θ) + O(k 3/2 ) MSE MSE { 2 M i U (ˆθ) = g 1i (ˆθ) + g 2i (ˆθ) + 2g 3i (ˆθ) Biasˆθ(ˆθ) γ i (ˆθ)} (3.6) E[ M U i (ˆθ)] = M i (θ, µ i (ˆθ)) + O(k 3/2 ) θ ˆθ ML, ˆθREML, ˆθF H, ˆθT R V ar θ (ˆθ ML ) = V ar θ (ˆθ REML ) = 2/ k i=1 (n iγ i ) 2 + O(k 3/2 ), V ar θ (ˆθ F H ) = 2k/( k i=1 n iγ i ) 2 + O(k 3/2 ), V ar θ (ˆθ T R ) = 2 k i=1 γ 2 i /N 2 + O(k 3/2 ) Bias θ (ˆθ REML ) = Bias θ (ˆθ T R ) = O(k 3/2 ), Bias θ (ˆθ ML ) = tr ( i n iγ i x i x i) 1 i (n iγ i ) 2 x i x i i (n iγ i ) 2 + O(k 3/2 ), Bias θ (ˆθ F H ) =2 k i (n iγ i ) 2 ( i n iγ i ) 2 ( i n iγ i ) 3 + O(k 3/2 ) MSE EBLUP MSE M i (θ, µ i (ˆθ)) ˆθ g 3i (θ) V ar θ (ˆθ) ˆθ MSE V ar θ (ˆθ ML ) = V ar θ (ˆθ REML ) V ar θ (ˆθ F H ) FH ML, REML MSE (3.6) M U i (ˆθ) Bias(ˆθ) = 0 θ REML 78
17 Datta et al. (2011), Rao (2003), Datta, Rao and Smith (2005), Kubokawa (2011b) Butar and Lahiri (2003), Hall and Maiti (2006a,b), Kubokawa and Nagashima (2011) 3.3 EBLUP EBLUP i µ i = x β +v i σ 2 e µ i µ i y i y i µ i N (µ i, σ 2 e/n i ) I i : y i ± z α/2 σ 2 e /n i (3.7) z α/2 α/2 1 α n i y i (3.1) µ i µ i N (0, σ 2 vi k ) µ i γ i = (1 + n i θ) 1 µ B i (β, θ) = x iβ + (1 γ i )(y i x iβ) y i µ i µ i y i N ( µ B i (β, θ), (σ 2 e/n i )(1 γ i ) ) µ i 1 α I B i (β, θ) : µ B i (β, θ) ± z α/2 (σ 2 e /n i )(1 γ i ) β, θ ˆθ y 1,..., y k θ β (3.4) 2 β(ˆθ) µ i µ EB i (ˆθ) = x i β(ˆθ) + (1 ˆγ i ) ( ) y i x 1 i β(ˆθ), ˆγ i = (1 + n iˆθ) 79
18 I B i (β, θ) Ii EB (ˆθ) : µ EB i (ˆθ) ± z α/2 (σ 2 e /n i )(1 ˆγ i ) µ EB i (ˆθ) y i 1 α k = 50, p = 3, 1 α = 0.95 β, n i, x i θ 1 Ii EB (ˆθ) 95% 0.99 I i * I i EB I i AEB 0.98 I i AEB I i * I i EB θ 1: I i, IEB i, Ii AEB 3.2 k 1 α, n 1 = = n k σe 2 Basu, Ghosh and Mukerjee (2003) n 1,..., n k σe 2 - (2005), Kubokawa (2010) Basu et al. (2003), z α/2 z α/2 {1 + (2k) 1 h(ˆθ)} I AEB i : µ EB i (ˆθ) ± z α/2 [1 + (2k) 1 h(ˆθ) ] (σ 2 e/n i )(1 ˆγ i ) (3.8) 80
19 h(ˆθ) h(ˆθ) = kn iˆγ i 2 Biasˆθ(ˆθ) + (1 + z 2 kn 2 i ˆγ i 4 1 ˆγ α/2) i 4(1 ˆγ i ) V arˆθ(ˆθ) 2 + kn iˆγ i 2 { x i 1 ˆγ i ( k j=1 n j x j x ) (ˆθ)} 1xi j + 2n iˆγ i V arˆθ 1 + n j ˆθ (3.9) Bias θ (ˆθ) = O p (k 1 ), ˆθ/ y i = O p (k 1 ) P [µ i I AEB i ] = 1 α + o(k 1 ), (k ) (3.1) ˆθ T R Bias θ (ˆθ T R ) = o(k 1 ), V ar θ (ˆθ T R ) = 2 k i=1 (1 + n iθ) 2 /N 2 + o(k 1 ) (3.9) n 1 = = n k = n h(ˆθ) = 1 + z2 α/2 2n 2ˆθ nˆθ { kx i ( k j=1 1xi } x j x j) Ii AEB 95%, θ > % 2 Ii AEB Ii Ii AEB LMM Kubokawa (2011b) Chatterjee, Lahiri and Li (2008), Hall and Maiti (2006b), Kubokawa and Nagashima (2011) 3.4 EBLUP EBLUP m 2 81
20 I i * I i * I i EB I i AEB I i AEB I i EB θ 2: I i, IEB i, Ii AEB i n i k = 48 n i y ij (2.2) y ij = β 0 + x 1i β 1 + x 2ij β 2 + x 3ij β 3 + v i + e ij x 1i i x 2ij (i, j) (i), x 3ij (i, j) x ij = (1, x 1i, x 2ij, x 3ij ), x i = (1, x 1i, x 2i, x 3i ), k ni i=1 j=1 (x ij x i )(x ij x i ) 2 (2.16) ˆσ e 2 λ λ = 2 ( ) µ i = β 0 + x 1i β 1 + x 2i β 2 + x 3i β 3 + v i ˆθ 3.1 ˆθ T R ˆθ T R, β(ˆθ T R ), ˆσ 2 e ˆθ T R = , β(ˆθ T R ) = (12.927, , , ), ˆσ 2 e = β 1 82
21 1: 1m 2 (EBLUP i (4.6) ) No. n i ˆv i y i EBLUP i β(ˆθt R ) 1/n i M U i EBLUP i
22 MSE Sample Mean EBLUP n i : y i MSE EBLUP i MSE M U i (No.1 No.48 ) 1 1m 2 No.1 No n i y i EBLUP i (3.3) β(ˆθ T R ) 1 EBLUP i y i β(ˆθ T R ) n i n i 1 (3.5) (MSE) 1/n i v i y i MSE M i U EBLUP i MSE (3.6) 3 y i MSE M i U n i No.1 No.48 EBLUP i y i n i n i 1 MSE MSE 0 84
23 1 ˆv i 1.42, 2.31, , ˆv i 4 Ii AEB y i Ii No.1 No.48 I AEB i (3.8) Ii n i I AEB i I AEB i 5 n i Ii n i Ii AEB, n i Ii AEB I i * (upper) I i AEB (upper) I i * (lower) I i AEB (lower) : I AEB i I i (No.1 No.48 ) 85
24 I i * I i AEB n i : I AEB i I i n i (n i No.1 No.48 ) 4 (LMM) 2.3 LMM, (2007) 4.1 Laird and Ware (1982), Tsimikas and Ledolter (1997), Das, Jiang and Rao (2004) Diggle, Liang and Zeger 86
25 (1994), Verbeke and Molenberghs (2000), McCullock and Searle (2001), Demidenko (2004), Fitzmaurice, Laird and Ware (2004), Molenberghs and Verbeke (2006) Hsiao (2003) (3.1) T (repeated measures data, longitudinal data) t = 1,..., T y i1,..., y it x i1,..., x it y i = (y i1,..., y it ), X i = (x i1,..., x it ) y i y i = X iβ + j T v i + e i (4.1) e i v i e i N T (0, (σ 2 e/n i )Q), v i N (0, σ 2 v) e i = (e i1,..., e it ) y it = x itβ + v i + e it, i = 1,..., k, t = 1,..., T, e is e it, s t, Q AR(1) T = 4 ρ < 1 Q 1 = Q 2 = 1 1 ρ 2 1 ρ ρ ρ ρ 1 ρ ρ ρ ρ 1 ρ ρ ρ ρ 1 = (1 ρ)i 4 + ρj 4, 1 ρ ρ 2 ρ 3 ρ 1 ρ ρ 2 ρ 2 ρ 1 ρ ρ 3 ρ 2 ρ 1 = (1 ρ2 ) ( 1 ρ i j ) 87
26 k y = y 1., X = X 1., v = v 1., e = e 1., y k X k v k e k Z = block diag(j T,..., j T ) y = Xβ + Zv + e (4.2) p q A = (a ij ), r s B A B = (a ij B) Z Z = I k j T v Cov (v) = G D = diag (σ 2 e/n 1,..., σ 2 e/n k ) y Σ = ZGZ + D Q ZGZ = (I k j T )(G 1)(I k j T ) = G J T Σ = G J T + D Q G = Cov (v) G = σ 2 v {(1 ρ v )I k + ρ v J k } 2 G (2.2), (3.1) Cov (v) = σ 2 vi k β v Σ = Cov (y) Σ =σ 2 vi k J T + D Q = diag (Σ 1,..., Σ k ), Σ i =σ 2 vj T + (σ 2 e/n i )Q, i = 1,..., k Σ 1 = diag ( ) Σ 1 1,..., Σ 1 k θ = σ 2 v /σe 2 Σ 1 i = n i {Q 1 n iθq 1 j T j T Q 1 } σe n i θj T Q 1 j T 88
27 v = (ˆv 1,..., ˆv k ) = GZ Σ 1 (y X β) ( ) ˆv i =σvj 2 T Σ 1 i y i X i β n i θ ( ) = 1 + n i θj T Q 1 j T Q 1 y i X j i β T β GLS ( k β = X i Σ 1 i X i i=1 ) 1 k i=1 X i Σ 1 i y i T µ i = j T X iβ/t + v i µ i = j T X i β/t + ˆv i Q Q 1 = (1 ρ)i T + ρj T Q 1 1 = 1 { ρ } I T 1 ρ 1 + (T 1)ρ J T j T Q 1 1 = {1 + (T 1)ρ} 1 j T ˆv i = n i θ 1 + (T 1)ρ + n i θt T t=1 ( ) y it x it β Q Q 2 = (1 ρ 2 ) 1 (ρ i j ) T = 4 1 ρ 0 0 Q 1 ρ 1 + ρ 2 ρ 0 2 = 0 ρ 1 + ρ 2 ρ 0 0 ρ 1 j T Q 1 2 = (1 ρ)(1, 1 ρ,..., 1 ρ, 1) = (1 ρ) 2{ j T + ρ(1 ρ) 1 (1, 0,..., 0, 1) }, j T Q 1 2 j T = (1 ρ) 2{ T + 2ρ/(1 ρ) } n i θ ˆv i = (1 ρ) 2 + n i θ{t + 2ρ/(1 ρ)} { T ( ) y it x it β + ρ ( y 1 ρ i1 x i1 β + y it x β )} it t=1 n i ρ 0 T t=1( yit x it β ) /T 89
28 4.2 v i t = 1,..., T v i T T t=1 (y it x itβ) T (4.1) j T v i y i = X iβ + v i + e i (4.3) v i = (v i1,..., v it ) N T (0, σ 2 vi T ) y i Σ i = σ 2 vi T + (σ 2 e/n i )Q, i = 1,..., k T µ it = x it β + v it E[v it y i ] = σv(0, 2..., 0, 1)Σ 1 i (y i x iβ) µ it = x β it + σv(0, 2..., 0, 1)Σ 1 i (y i X i β) Σ i = (σe/n 2 i )(n i θi T + Q) ( ) ( A 11 a 12 n i θi T + Q = A =, A 1 A 11 a 12 = a 21 a 22 a 21 a 22 a 22 a 22.1 = a 22 a 21 A 1 11 a 12 a 21 = a 21 A 1 11 /a 22.1, a 22 = 1/a 22.1 µ it µ it = x β it + n { iθ (y a it x β) } it (a 21 A 1 11, 0)(y i X i β) (4.4) 22.1 y it x it β T 1 Q Q 1 = (1 ρ)i T + ρj T a 22.1 = (n i θ + 1 ρ)(n i θ (T 1)ρ)/(n i θ (T 2)ρ), a 21 A 1 11 = {ρ/(n i θ ) 90
29 (T 2)ρ)}j T 1, µ it =x β n i θ(n i θ (T 2)ρ) { it + (y (n i θ + 1 ρ)(n i θ (T 1)ρ) it x β) it ρ T 1 } (y n i θ (T 2)ρ it x it β) t=1 (4.5) n i µ it y it, ρ 0 µ it x it β + {n i θ/(1 + n i θ)}(y it x it β) Q Q 2 = (1 ρ 2 ) 1 (ρ i j ) (4.4) T = 3 µ it =x β it + n iθ (n i θ + 1) 2 ρ 2 (n i θ) 2 n i θ + 1 (n i θ + 1) 2 ρ 2 n i θ(n i θ 1) { (y it x it β) ρ (n i θ + 1) 2 ρ 2 (n i θ) 2 [ ni θρ(y i,t 2 x i,t 2 β) + (n i θ + 1)(y i,t 1 x i,t 1 β) ]} (4.6) (4.5) n i θρ < n i θ + 1 (4.6) n i µ it y it, ρ 0 µ it x it β + {n i θ/(1 + n i θ)}(y it x it β) θ, ρ ML REML t β β t = ( k j=1 n jx jt x jt) 1 k j=1 n jx jt y jt ê it = y it x it β t θ (2.16), S 2 = T k t=1 i=1 n iê 2 it, n = T k k k { n i tr ( n 2 i x it x it)( n i x it x it) 1 } t=1 i=1 i=1 i=1 ˆθ T R = max{ 1 n (S 2 σ 2 e T (k p) ), 1 } k 2/3 91
30 ρ, ˆρ = k i=1 n i ˆρ i /N ˆρ i Q 1, e i = T t=1 êit/t, T 1 ˆρ i = 2 t=1 s=t+1 T (ê is e i )(ê it e i ) /{(T 1) T (ê it e i ) 2 } Q 2, ˆρ i = T t=2 (ê it e i )(ê i,t 1 e i )/ T t=1 (ê it e i ) 2 ˆρ < 1, ML, REML Q 2 (4.4) (4.6) (T = 5) ˆθ T R = , ˆρ = EBLUP i 2001 EBLUP i 5, (4.4) 6 ˆv it ˆv it Nos.1, 3, 4, 13, 14, 33 ˆv it ˆv it (No.1, 3, 4) No.13, 14, 33 t=1 4.3 (GLMM) k i n i y i1,..., y ini 92
31 2.0 No. 1 No.13 No. 3 No. 14 No. 4 No No No No.4 No No.3 No : ˆv it ˆv it v i y ij f(y ij v i ) = exp {[y ij θ ij b(θ ij )]/τ ij + c(y ij, τ ij )}, j = 1,..., n i ; i = 1,..., k, θ ij τ ij (> 0) τ ij y ij E[y ij v i ] = µ ij µ ij g( ) x ij g(µ ij ) = x ijβ + v i v i N (0, σ 2 v) GLMM GLMM McCullagh and Nelder (1989, 14.5 ) Fahrmeir and Tutz (2001), McCulloch (2003) McCulloch and Searle (2000) Lawson, Browne and Vidal Rodeiro (2003), Lawson (2006) GLMM 93
32 (Standardized Mortality Rate, SMR), ( )/( ) SMR GLMM (1988) 4.4 (2.2) y ij = µ ij + e ij, µ ij = x ijβ + v i y ij (µ ij, σ 2 e) N (µ ij, σ 2 e) µ ij µ ij N (x ijβ, σ 2 v) β, σ 2 v, σ 2 e β, σ 2 v, σ 2 e (2.2) β, σ 2 v, σ 2 e (i, j)- µ ij µ (µ, σ 2 e) (β, σ 2 v) π 1 (µ, σ 2 e β, σ 2 v) (β, σ 2 v) π 2 (β, σ 2 v) π 1 (µ, σ 2 e β, σ 2 v) µ ij (β, σ 2 v) N (x iβ, σ 2 v), σe 2 σe 2 dσe 2 σe 2 dσe 2 π 2 (β, σv) 2 σv 2 dσv 2 β (1) dβ, (2) β σ2 v N (β 0, σva), 2 σ 2 v 94
33 (3) β (σ 2 v, λ) N (β 0, λσ 2 va), λ π 3 (λ), β 0, A Kubokawa and Strawderman (2007) Banerjee, Carlin and Gelfand (2004) 5 C. Stein (MSE) n 1 = = n k = n (3.1) µ i = x iβ + v i µ = (µ 1,..., µ k ) µ S = X β { + max 1 (k p } 2)σ2 e n y X β, 0 (y X β) 2 β = (X X) 1 Xy β OLS Stein k p 3 µ S MSE y MSE Stein (1991) (2004) 20 n 1 = = n k = n (3.1) µ EBLUP θ REML (3.3) µ S (k p 2) (k p) Henderson BLUP 1950 Stein EBLUP Henderson Stein 95
34 2.4 LMM LMM, n 1 = = n k = n (2.2) (2.16) S 1 S 2 S 1 /σ 2 1 χ 2 m 1, S 2 /σ 2 2 χ 2 m 2 m 1, m 2 σ 2 1 = σ 2 e, σ 2 2 = σ 2 e + nσ 2 v σ2 1, σ 2 2 σ2 1 < σ 2 2 Srivastava and Kubokawa (1999), Kubokawa and Tsai (2006) LMM Jiang, Rao, Gu and Nguyen (2008) Fence Kubokawa and Srivastava (2010) LMM (AIC) Vaida and Blanchard (2005) AIC Kubokawa (2011a), Kubokawa and Nagashima (2011) LMM Carleton John N.K. Rao LMM Rao (Statistica Canada) PhD PhD Rao ,
35 [1] Banerjee, S., Carlin, B.P. and Gelfand, A.E. (2004). Hierarchical Modeling and Analysis for Spatial Data. Chapman and Hall, New York. [2] Basu, R., Ghosh, J.K., and Mukerjee, R. (2003). Empirical Bayes prediction intervals in a normal regression model: higher order asymptotics. Statist. Prob. Letters, 63, [3] Battese, G.E., Harter, R.M. and Fuller, W.A. (1988). An errorcomponents model for prediction of county crop areas using survey and satellite data. J. Amer. Statist. Assoc., 83, [4] Butar, F.B. and Lahiri, P. (2003). On measures of uncertainty of empirical Bayes small-area estimators. J. Statist. Plan. Inf., 112, [5] Chatterjee, S., Lahiri, P., and Li, H. (2008). Parametric bootstrap approximation to the distribution of EBLUP and related prediction intervals in linear mixed models. Ann. Statist., 36, [6] Das, K., Jiang, J. and Rao, J.N.K. (2004). Mean squared error of empirical predictor. Ann. Statist., 32, [7] Datta, G.S., Kubokawa, T., Rao, J.N.K., and Molina, I. (2011). Estimation of mean squared error of model-based small area estimators. Test, an Official Journal of the Spanish Society and Operations Research, 20, [8] Datta, G.S., Rao, J.N.K. and Smith, D.D. (2005). On measuring the variability of small area estimators under a basic area level model. Biometrika, 92, [9] Demidenko, E. (2004). Mixed Models: Theory and Applications. Wiley. [10] Diggle, P., Liang, K.-Y., and Zeger, S.L. (1994). Longitudinal Data Analysis. Oxford Univ. Press. 97
36 [11] Efron, B. and Morris, C. (1975). Data analysis using Stein s estimator and its generalizations. J. Amer. Statist. Assoc., 70, [12] Fahrmeir, L. and Tutz, G. (2001). Multivariate Statistical Modelling Based on Generalized Linear Models. 2nd ed. Springer, New York. [13] Fay, R.E. and Herriot, R. (1979). Estimates of income for small places: An application of James-Stein procedures to census data. J. Amer. Statist. Assoc., 74, [14] Fitzmaurice, G.M., Laird, N.M., and Ware, J.H. (2004). Applied Longitudinal Analysis. Wiley. [15] Hall, P. and Maiti, T. (2006a). Nonparametric estimation of meansquared prediction error in nested-error regression models. Ann. Statist., 34, [16] Hall, P. and Maiti, T. (2006b). On parametric bootstrap methods for small area prediction. J. Royal Statist. Soc., 68, [17] Henderson, C.R. (1950). Estimation of genetic parameters. Ann. Math. Statist., 21, [18] Hsiao, C. (2003). Analysis of Panel Data. Cambridge University Press. (2007) [19] Jiang, J., Rao, J.S., Gu, Z., and Nguyen, T. (2008). Fence methods for mixed model selection. Ann. Statist., 36, [20] Kubokawa, T. (2000). Estimation of variance and covariance components in elliptically contoured distributions. J. Japan Statist. Soc., 30, [21] Kubokawa, T. (2010). Corrected empirical Bayes confidence intervals in nested error regression models. J. Korean Statist. Soc., 39, [22] Kubokawa, T. (2011a). Conditional and unconditional methods for selecting variables in linear mixed models. J. Multivariate Analysis, 102,
37 [23] Kubokawa, T. (2011b). On measuring uncertainty of small area estimators with higher order accuracy. J. Japan Statist. Soc., to appear. [24] Kubokawa,T., and Nagashima, B. (2011). Parametric bootstrap methods for bias correction in linear mixed models. Discussion Paper Series, CIRJE-F-801. [25] Kubokawa, T., and Srivastava, M.S. (2010). An empirical Bayes information criterion for selecting variables in linear mixed models. J. Japan Statist. Soc., 40, [26] Kubokawa, T. and Strawderman, W.E. (2007). On minimaxity and admissibility of hierarchical Bayes estimators. J. Multivariate Analysis, 98, [27] Kubokawa, T. and Tsai, M.-T. (2006). Estimation of covariance matrices in fixed and mixed effects linear models. J. Multivariate Analysis, 97, [28] Laird, N.M. and Ware, J.H. (1982). Random-effects models for longitudinal data. Biometrics, 38, [29] Lawson, A.B. (2006). Statistical Methods in Spacial Epidemiology. 2nd ed. Wiley, England. [30] Lawson, A.B., Browne, W.J. and Vidal Rodeiro, C.L. (2003). Disease Mapping with WinBUGS and MLwiN. Wiley, England. [31] McCulloch, C.E. (2003). Generalized Linear Mixed Models. NSF-CBMS Regional Conference Series in Probability and Statistics, Volume 7. IMS, USA. [32] McCulloch, C.E. and Searle, S.R. (2001). Generalized, Linear and Mixed Models. Wiley, New York. [33] Molenberghs, G. and Verbeke, G. (2006). Models for Discrete Longitudinal Data. Springer. [34] Rao, J.N.K. (2003). Small Area Estimation. Wiley, New Jersey. 99
38 [35] Searle, S.R., Casella, G., and McCulloch, C.E. (1992). Variance Components, Wiley, New York. [36] Srivastava, M.S. and Kubokawa, T. (1999). Improved nonnegative estimation of multivariate components of variance. Ann. Statist., 27, [37] Tsimikas, J.V. and Ledolter, J. (1997). Mixed model representation of state space models: New smoothing results and their application to REML estimation. Statistica Sinica, 7, [38] Vaida, F., and Blanchard, S. (2005). Conditional Akaike information for mixed-effects models. Biometrika, 92, [39] Verbeke, G. and Molenberghs, G. (2000). Linear Mixed Models for Longitudinal Data. Springer, New York. [40] (1992)... [41] (2007).. 35, [42] (2007). BLUP.. [43],,, (2004). :. [44] (2005).. ), 35, [45] (1991). Stein., 20, [46] (1988).., 17,
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