Short-Run Capacity Externality Dynamics
Expert TheoryReview
Introducing educational vouchers can create short-run negative externalities for non-participating students before private school supply capacity expands or public school fixed costs adjust.
Picture this
If a city suddenly issues free subway passes before transit authorities can add more train cars, platforms become overcrowded and non-pass holders get delayed. Once private transit operators introduce new trains to meet demand, the overcrowding disappears and service stabilizes.
What the evidence says
Model proves negative externalities on non-recipients are confined to short-run capacity bottlenecks and fixed-cost reallocations, whereas long-run free market entry eliminates negative welfare impacts if vouchers equal or stay below public per-student costs.
- Who was studied
- Theoretical framework applied to short-run versus steady-state voucher dynamics in urban education markets.
- How
- Comparative statics analysis modeling inelastic short-run private school capacity and public school fixed costs versus long-run free entry and constant returns to scale.
What to do
Implement multi-year phased rollout schedules for educational vouchers to allow private supply capacity to expand and prevent short-run overcrowding externalities.
From the source
"In the short run, before private school capacity can respond, school choice could hurt non-participants by squeezing them out of a limited supply of private school places."
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