The U.S. Department of Defense (DoD) has faced numerous challenges within the realm of Geospatial Information Systems and Science in fostering a Common Operational Picture suitable to homeland defense and security. This paper details the challenges and successes since September 11th, 2001 to...

In most electoral agency models, the principal observes an increasing signal of the agent's effort. But in enforcement contexts, the signal may be nonmonotonic. This is the case if the principal observes enforcement actions rather than underlying violation incidents (e.g., crime or infections)....