Security is always an economic activity too. The crash engrs at Ford could demand 30 mph speed governers, quarter inch steel plates, 5 point harnesses, and hel

Security is always an economic activity too. The crash engrs at Ford could demand 30 mph speed governers, quarter inch steel plates, 5 point harnesses, and helmets, but people need a car that costs less than $200k and gets more than 2 miles per gallon. Sometimes security requirements _are_ too onerous.