But Mr. Curtis's comments indicated that safekeeping measures may have been far more extensive.
Second, past studies' reliance on average survey measures may have concealed variation within the donor population.
This suggests that self-report measures may have limited utility as proxies for neurocognitive performance.
A separate analysis, by two Treasury Department specialists, says subsequent measures may have reduced these erroneous payments by $2 billion.
The capacity to detect significance in these measures may have been affected by the small sample size in this study.
These measures may have been able to account for the observed differences between the clinical and control groups.
The importance of optimum planting patterns is highlighted when we learn that agricultural measures may have environmental side effects.
Carbon pricing measures may have to be levied at a greater rate to affect behavioural change, particularly given the limited potential for future aviation efficiency gains.
And, if passed, many of the proposed stimulus measures may have scant short-term impact.Massive extra spending is increasingly unlikely.
"Some measures may have made things marginally worse, others marginally better," says Klaus Zimmermann, head of the DIW.
But the measures may have to wait until Congress resumes normal business in September.Delay might be expensive, for two reasons.
