Wages in “right-to-work” (RTW) states are 3.1 percent lower than those in non-RTW states, after controlling for a full complement of individual demographic and socioeconomic factors as well as state macroeconomic indicators. This translates into RTW being associated with $1,558 lower annual wages for a typical full-time, full-year worker.

Source: “Right-to-Work” States Still Have Lower Wages