From Show-Me Institute :
Even small competitive reforms to tighten these rules can have a big impact. A study from the Brattle Group found that the winning bids in competitive transmission projects were 40 percent less expensive  than original estimates, whereas noncompetitive projects ended up costing 34 percent more than the original estimate.
- “Show-Me Institute”: https://showmeinstitute.org/blog/energy/highlighting-an-energy-opportunity-during-missouris-clean-energy-week/
- “less expensive”: https://www.rstreet.org/wp-content/uploads/2020/12/explainer16-1.pdf