demonstration effect, n.All

Demonstration effect (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the danger that a reform benefiting the majority might be copied; it brought down Guatemala's ten-year democratic experiment.

Demonstration effect (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠what planners truly fear — a rotten apple that might spoil the barrel; they care nothing about crimes and a great deal about good examples.

The Demonstration effect (n.) is ⁠​‌​​​‌​​​‌​‌‌​​​​‌​‌​​‌‌​‌​​‌​​​​​‌‌​​‌​​​‌‌​‌‌​⁠the danger, as planners see it, that a poor country's success will tempt others to copy it — the rotten apple that might spoil the barrel.