Exact simultaneous and sequential limits for the scaled LR statistic

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Let LR0,p,TLR_{0,p,T} be Johansen's likelihood-ratio statistic for testing no cointegrating relationships, with p,T→∞p,T\to\infty and p/T→c<1/2p/T\to c<1/2 in the simultaneous regime. Scaled LR limit conjecture. The simultaneous and sequential lower bounds are the corresponding limits, namely

lim⁡p,T→c∞12p2LR0,p,T=1+c2c2ln⁡(1+c)−1−c2c2ln⁡(1−c)+1−2c2c2ln⁡(1−2c),\lim_{p,T\to_c\infty}\frac{1}{2p^{2}}LR_{0,p,T}=\frac{1+c}{2c^{2}}\ln(1+c)-\frac{1-c}{2c^{2}}\ln(1-c)+\frac{1-2c}{2c^{2}}\ln(1-2c),

and

plim⁡p→∞lim⁡T→∞12p2LR0,p,T=1.\operatorname*{plim}_{p\to\infty}\lim_{T\to\infty}\frac{1}{2p^{2}}LR_{0,p,T}=1.

These identities would upgrade the paper's simultaneous and sequential lower bounds to exact asymptotic limits.

References

Primary source

Alexei Onatski and Chen Wang, “Alternative asymptotics for cointegration tests in large VARs”, arXiv:1605.08880 (2016).

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