Nonparametric cointegration analysis



Separate Appendix to:
NONPARAMETRIC COINTEGRATION ANALYSIS
by Herman J.Bierens

Following Phillips (1987), we use throughout this appendix the symbol "" to indicate weak
convergence (cf. Billingsley 1968), convergence in distribution, or convergence in probability.
From the context it will be clear which mode of convergence applies.

Proof of Lemma 1: Denoting the partial sums associated with vt and wt by

[χn ]

Snv(χ) = 0 i [0,n ^1); Snv(χ) = vtif χ [n ^1,1L
t= 1

(A.1)


[xn ]

Snw(χ) = 0 i [0,n l) Snw(χ) = ∑ft ifχ [n^1,ι].

t=1

respectively, it follows easily that

( A

Snv


vf
Sn
V √


D (1)J


W,


(A.2)


where W is a q-variate standard Wiener process. Next, denote the partial sums associated with
zt and zt by

[χn ]

Sn(χ) = 0 if χ [0,n 1); Sn(χ) = ∑-χ if χ [n ^1,1],
t= 1
[χn]

(A.3)


s^δ(χ) = 0 if χ [0,n 1); Snz(χ) = ∑∆ztif χ [η ^1,1L
t=1

respectively. Then it follows from (3) and (A.2) that

37



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