Developers who inspect code are at least 20% more productive

Research Finding:
Designers and programmers learn to improve their work through participating in inspections and inspections improve productivity by 20% or more.

Sources:

Cover of IBM Systems Journal Design and Code Inspections to Reduce Errors in Program Development
Cover of Managing the Software Process Managing the Software Process
Cover of Software Inspection Software Inspection
Cover of Peer Reviews in Software: A Practical Guide Peer Reviews in Software: A Practical Guide