Economist.com | Outsourcing: The big picture
"A forthcoming study by McKinsey looks at possible shifts in global employment patterns in various service industries, including software engineering, banking and IT services. Between them, these three industries employ more than 20m workers worldwide. The supply of IT services is the most global. Already, 16% of all the work done by the world's IT-services industry is carried out remotely, away from where these services are consumed, says McKinsey. In the software industry the proportion is 6%. The supply of banking services is the least global, with less than 1% delivered remotely."