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The ripple effect of housing price movements between cities has been extensively investigated, but there are relatively few studies on this topic within a metropolitan context, especially at the submarket level. This paper describes the use of ripple effect theory to examine the diffusion process and convergence of intra-urban housing prices at the submarket level in Shanghai, an emerging global city in China. The analysis is based on directed acyclic graphs, local indicators of spatial association time-paths, and a recently developed convergence test. The empirical results of grouping analysis identify 25 submarkets in Shanghai, and the diffusion of housing prices between these submarkets is found to be caused by both geographical and economic proximities. There is also a complex recursive process of price spillovers from high- to low-priced submarkets, and vice versa, which contributes to the spiraling local housing prices. Housing prices diverge across all submarkets, and the whole market can be divided into three convergence clubs. Finally, these convergence clubs have a circular structure with a degree of continuity. This study broadens our knowledge of the price interrelationship among housing submarkets at the intra-urban level. These findings have profound implications for urban planners, policy makers, and local residents.

Regional integration is increasingly used as a policy strategy to accelerate urban development and regional cooperation. This research assesses the effects of regional integration on housing prices to evaluate policy effectiveness for small and medium-sized cities on the peripheries of core cities. Taking as a case study the Chinese city of Kaifeng-a contiguous city in the Zhengzhou megaregion-we utilized hedonic house price modelling and spatial econometrics to investigate the effect of Kaifeng's integration with the core city on the dynamics and determinants of housing prices between 2001 and 2016. The results show that housing prices in Kaifeng increased significantly after the city's integration with Zhengzhou in 2005. Further, the results confirm that the regional integration had a significantly positive effect on housing prices, especially in border areas. Moreover, the new time-saving crossborder light rail system had more influence on the prices of nearby housing than the new expressway, and new urban districts with high-quality amenities led to a sharp rise in housing prices in Kaifeng. Our findings offer policymakers some guidance concerning regional cooperation and urban development.Keywords Regional integration . Urban housing prices . Urban development .