If the quality of a government service improves while staff numbers and costs remain unchanged, what may real-output measurement do?

Correct answer: It may understate the quality improvement

When government output is measured mainly from inputs such as employee numbers or expenditure, unchanged inputs can make measured output appear unchanged. However, the service may have become more useful or effective because its quality improved. Unless the statistical system adjusts for that quality change, real output and productivity growth will be understated. Thus option A is correct; the other choices are not consequences of this measurement limitation.