Their talk is dominated by words about the job's physical demands.
Click on 2 for a question about supply and demand.
Some home builders also wonder about demand for the product.
But those close to him said he genuinely worried about the office's demands on his time.
The election process generates very little information about the population's demands for specific public services.
"And if drugs were the operative reason for the crime increase, then something had to be done about demand."
But he said that it was too early to make firm forecasts about demand.
Speaking as a parent, union power is not by any means the only problem - there's a simple question about supply and demand.
"The warmer temperatures have run fear into people about future demand."
"This is not all about real demand anymore," he said in a note to the bank's clients.