These effects on productivity can be dramatic in both young children and adults.

But why did those companies focus so keenly on productivity?

Management of the Government is being improved, with special emphasis on productivity.

It is one thing to reach an agreement on productivity, he said, and another to get results.

It is hard to measure the actual impact on national productivity.

"Now, we have to start to grow the revenue line and keep a close check on productivity."

Data on productivity is not reliable before the 20th century.

"It's not only losses now but the impact on productivity into the future."

A focus on productivity - doing more with less - is also critical.

To measure the impact of personal computers on productivity, you have to look at how and where they are used today.