This phraseology drives me crazy
They are assuming people just stop looking for work - and what? Sit at home and spin gold cloth for groceries and mortgage payments?
They are placing a psychological descriptive guess on a statistic...argh.
It's not a "psychological descriptive guess" to say some stopped looking for work in futility and why. The reason, "current economic conditions make them believe that no work is available for them," isn't data they can't obtain.