An alternative but essentially equivalent approach is to consider whether the share of income devoted to human capital spending changes with income.
Essentially, whether or not he agreed with it, he did as he was told without demur.
What the F.A.A. has not addressed is a deeper question: essentially, whether transportation can follow an Internet-style model of dispersed, rather than congested, activity.
Whether the infrastructure plans will materialise is partly down to politics: essentially, whether Republicans in Congress will endorse a huge burst of the kind of economic interventionism they have been trained to hate for the best part of 40 years.
The next weeks or months will determine essentially whether the Shiite Muslim movement Hezbollah will decide who rules this Mediterranean country, a development that will help define America's influence in the region.
The merger of Disney and ABC raises questions about the drawbacks of giantism, and about whether synergy is as good for the public as it may be for Disney--about, essentially, whether Disney is too big, too centralized, too intent on asserting managerial control.
It is protesting about the US legislation due to be brought in by the Federal Communication Commission (FCC) about "net neutrality" – essentially whether the internet should run at one speed for all companies and services, or should be divided into a fast and a slow lane.
The players' argument for the injunction hinges on Nelson's opinion about whether the players properly renounced their labor rights in favor of their antitrust rights: essentially, whether Nelson believes the decertification of the union was legitimate, as players contend, or a sham bargaining tactic, as owners argue.
Greeks go to the polls on Sunday to decide, essentially, whether they want to stay in the euro zone or not.
St Aubyn talked of his fiction being concerned essentially with whether characters could be free.
Suspense hangs essentially on whether Nick will be able to secure genetic proof of his own narcissism.
