Who knows how effective such advice can ever really be.
These "unconventional measures" include large purchases of government bonds to reduce long-term interest rates, intervention to push down the dollar, or buying private securities to push up asset prices.Nobody knows how effective such measures might be.
Our data do not address directly the proportion of NMDA receptors that are triheteromeric complexes of GluN1, GluN2A and GluN2B subunits (Chazot and Stephenson, 1997; Rauner and Köhr, 2011) as we do not know how effective TCN 213 is at blocking such receptor combinations.
Although bloodworms can inflict painful bites in defense, we do not know how effective these are in deterring predation by their natural predators, such as fish and birds.
Want to know how effective these are?
We know how effective that was.
"I don't know how effective it is.
I don't know how effective it has been.
She added: "I don't know how effective spraying for mosquitoes will really be.
Local officials say it is hard to know how effective the law will be.
