Behavioral responses to wealth taxes : evidence from Switzerland

We study how reported wealth responds to changes in wealth tax rates. Exploiting rich intranational variation in Switzerland, the country with the highest revenue share of annual wealth taxation in the OECD, we find that a 1 percentage point drop in the wealth tax rate raises reported wealth by at least 43% after 6 years. Administrative tax records of two cantons with quasi-randomly assigned differential tax reforms suggest that 24% of the effect arise from taxpayer mobility and 20% from house price capitalization. Savings responses appear unable to explain more than a small fraction of the remainder, suggesting sizable evasion responses in this setting with no third-party reporting of financial wealth.