Finally L 0 ( ℱ, R ), as a sublattice of L ̄ 0 ( ℱ, R ), is complete in the sense that every subset with an upper bound has a supremum (equivalently, every subset with a lower bound has an infimum).
But it is clear that the zero nominal interest rate bound has proven costly.
… but follow up with this: "But it is clear that the zero nominal interest rate bound has proven costly".
Perhaps Kevin Spacey, with one bound, has discovered another Yasmina Reza, whose West End smash Art went through 30 cast changes - or at least felt like it did.
It certainly seems like the zero bound has a constraining effect on monetary policy, if not in theory than at least in the minds of central bankers.
Many economists—including Mr Summers reckon this "zero lower bound" has kept central banks from slashing interest rates enough to get investment going and economies back on track.
Corresponding error bound has been derived.
The numerical results show that the lower bound has a better performance than the previous schemes.
A general A- and D-efficiency lower bound has been obtained for partial diallel cross designs.
On the other hand, the error incurred by the lower bound has a similar pattern for both EgBf and AlBf; thus, the lower bound has better accuracy in determining the crossing points of the actual sum rates.
Note that the delay-independent bound has been correctly derived in [25] using the first method, the Lyapunov method.
