Terri Hallenbeck, Burlington Free Press, March 19, 2010 Montpelier - An economist who helped Taiwan and other nations create their health care systems told Vermont lawmakers Thursday that a single-payer plan can lower costs, but is not necessarily a foolproof remedy. William Hsiao, an economics professor at Harvard University, testified before House and Senate health committees as Vermont legislators look for ways to broaden health care coverage while also curbing escalating costs. "Single-payer can actually lower the level of health spending," he said of a system where there is a single insurance provider. ... Vermont