We examine the impact of estate and gift taxes on inter vivos giving in Taiwan. The two estate and gift tax reforms, one of which substantially reduced tax progressivity in 2009 while the other slightly increased tax rates in 2017, provide opportunities to perform quasi-experiments using estate and gift tax schedules to alleviate the endogeneity problem associated with these tax rates and inter vivos giving. Using estate and gift tax return data, the difference-in-differences estimators suggest that there were significant increases in inter vivos giving after the 2009 reform, but that such giving decreased after the 2017 reform. Individuals were found to be more responsive to tax hikes than tax cuts.