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α: calibrated so average coauthorship-adjusted count equals average raw count
We study the effect of domestic corporate tax on firms' outward direct investment (ODI) decisions. We exploit a tax unification reform in China that raises corporate income tax rates on foreign‐funded firms but reduces those on domestic Chinese firms. Using a difference‐in‐differences estimator that compares the ODI of foreign affiliates and joint ventures with private domestic firms before and after the reform, we find that a higher domestic corporate tax rate increased the ODI of foreign firms, particularly for joint ventures with Chinese majority shareholders. We show evidence that the increases in firm ODI reflect production relocation out of China.