More than 18,000 Hall County families would benefit from a state-level tax credit that supports low-income workers, according to research from the Georgia Budget and Policy Institute, infusing about $4.3 million into the local economy. Representatives from the Atlanta-based research firm gathered Friday with local nonprofit and business leaders, as well as state lawmakers and candidates for office, at the North Georgia Community Foundation in Gainesville to advise about the earned income tax credit. The tax credit is meant to incentivize work, GBPI Research Director Wesley Tharpe said, by supporting parents with dependent children.