The Community Service Society studied employment conditions among black men in New York City.
"The number of shares sold under the trading plan will depend on market conditions, among other factors," the government said.
It also found low wages, excessive working hours and precarious conditions among workers employed by its suppliers.
Even for the 43 CCGs the NHS Commissioning Board has authorised without conditions among the 211 groups, there are difficulties.
'We have already seen too many incidences of heart problems and other serious medical conditions among players.
Successive retendering of contracts had produced a "staggering array of different terms and conditions among people delivering the same public service," the study found.
A major cause for concern inside and outside the administration is what most experts say are the worst conditions among Palestinians they have ever seen.
These findings coincided with newspaper reports in Hanoi that blamed Agent Orange for a range of crippling conditions among troops and their families.
In his January letter to parents, Bowdoin's president, Barry Mills, expressed his concern about what appeared to be a national increase in stress-related conditions among college students.
Administration officials and outside observers speak of a frightened and despairing Israeli population, as well as what one called "horrific" conditions among the Palestinian people.
In her first report to the New York Friends, Jacobs described these conditions among the refugees in Alexandria as "pitiable".
