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Given its significant implications for the economy and society, this paper investigates the impact of housing supply regulation on household wealth inequality. Utilizing data from the China Household Finance Survey and land transaction records spanning from 2013 to 2019, we employ recentered influence function regression and two-way fixed effects models to analyze the effect of unexpected housing supply shocks on the wealth gap among households. Our findings reveal that positive unexpected housing supply shocks are crucial in reducing household wealth inequality. This reduction is attributed to the heterogeneous impacts of housing supply regulation on different wealth groups. By deregulating the housing supply, the upward trend in housing prices has slowed, which in turn makes homeownership more accessible and facilitates wealth accumulation for households that fall within the 20 % and 80 % wealth quantiles. Conversely, deregulation has a negative impact on property values for households in the 80–100 % wealth quantile, thus mitigating their overall wealth growth. Overall, this study emphasizes the significant role of housing supply regulation in shaping wealth inequality in China. • This paper examines the housing supply regulation's impact on wealth inequality in China. • Positive housing supply shocks play a vital role in decreasing household wealth inequality. • Deregulation boosts homeownership for 20 %–80 % wealth quantile households. • Wealthiest households face property value drops with deregulation. [ABSTRACT FROM AUTHOR]

China is a country of homeowners, where >80% of households own their homes and >20% of urban households own multiple homes. China achieved this unprecedented high rate home ownership in a short period of three decades. While we have a growing understanding of homeownership in general we are less clear about the process and outcomes of multiple home ownership in China. This paper examines the patterns of and driving forces for multiple home ownership, and explores the implications for housing inequality in Chinese cities. While socio-economic factors appear critical in China as is the case in the West, we argue for an institutional and cultural perspective to better understand multiple home ownership in China. The empirical analyses using 2015 China Household Finance Survey show that households who received housing subsidies, have urban registration, experienced demolition and resettlement, have school age children attending key schools, and have sons are more likely to own multiple homes. By focusing on the institutional and cultural forces, this paper better explains the unprecedented high rate of multiple homeownership in Chinese cities, and demonstrates how various housing policies in China have unintentionally contributed to multiple homeownership and thus housing and wealth inequality. • Multiple home ownership rate is unprecedented high in Chinese cities • Institutional and cultural factors together with sociodemographic forces drive multiple home ownership in China • Housing subsidies and resettlement promote multiple home ownership • Rural migrant are less while urban migrant are more likely to own multiple homes than local urban homeowners • Having children attending key schools and having sons encourage multiple homes. [ABSTRACT FROM AUTHOR]