The experiment design allows us to disentangle "workload division or commitment" effects from "feedback provision" effects.
However, it is still not well known whether this resource provisioning effect is strong enough to improve herbivore regulation within crop fields and which plant species and functional groups favour this ecosystem service.
The provision takes effect in 2011.
But the Brazilian Congress has yet to adopt legislation to put the provision into effect.
The provision takes effect on or after Sept. 23, whenever health plans renew coverage.
Parts of that provision took effect in 2010 and other parts this year.
Officials said they envisioned the provision taking effect immediately after the health care bill is signed into law.
The Securities and Exchange Commission appears certain to miss its end-of-year deadline for issuing regulations to put the provision into effect.
Even so, these arguments have long prevailed at the Securities and Exchange Commission, delaying regulations to put the pay-ratio provision into effect.
It included the line: "Our ambition should be to break down the barriers between private and public provision, in effect denationalising the provision of health care in Britain".
