Publications

Expansion of subway networks helps to enhance connectivity and matches of people by facilitating their mobility. Using rapid expansion of the Beijing subway from 2000 to 2018, we analyze its impact on collaborative matches in innovations. We find that an hour reduction in travel time between a pair of locations in Beijing brought a 15% to 38% increase in collaborated patents. Far-apart location pairs were more affected, and the local average treatment effect is approximately 35% to 82%. Such effect is mainly driven by increased matches among highly productive inventors due to complementarity between inventors’ productivity and travel time. At the same time, we find that the entry of new inventors, relocation of existing inventors, and low productive inventors also contribute to the increase in collaborative matches, especially in the long run

The household registration system (hukou system) in China has hampered rural-urban migration by posing large migration friction. The system has been gradually relaxed in the past few decades, but the reforms have been differential in city size. We find a striking contrast in migration patterns between years 2005 and 2015; rural people tended to move more to large cities in 2005, but more to small- and medium-sized cities in 2015. We calibrate a spatial quantitative model to the world economy in both years with China divided into rural, mega-city, and other-city regions. We find that alternative urbanization policies that are not differential and that are more laissez-faire substantially improve national welfare, in magnitudes that are comparable to the welfare gains from the trade liberalization that China has put in place in the past.

This article estimates hedonic prices for different levels of housing space, by exploiting a unique space‐adding project in Singapore that added a uniform amount of space to each existing housing unit regardless of the original size. This space adding program was carried out if sufficient residents vote in favor of space adding. Using a difference‐in‐differences (DiD) strategy after restricting our sample to narrow margins around the voting cutoff, we find that the additional space increased the resale price of a housing unit by 7% on average, and the extent of price appreciation varied significantly across the original size of the units.

Objectives: Better understanding of the dynamics of the COVID-19 (2019 novel coronavirus disease) pandemic to curb its spread is now a global imperative. While travel restrictions and control measures have been shown to limit the spread of the disease, the effectiveness of the enforcement of those measures should depend on the strength of the government. Whether, and how, the government plays a role in fighting the disease, however, has not been investigated. Here, we show that government management capacities are critical to the containment of the disease. Setting: We conducted a statistical analysis based on cross-city comparisons within China. China has undergone almost the entire cycle of the anticoronavirus campaign, which allows us to trace the full dynamics of the outbreak, with homogeneity in standards for statistics recording. Primary and secondary outcome measures: Outcome measures include city-specific COVID-19 case incidence and recoveries in China. Results: The containment of COVID-19 depends on the effectiveness of the enforcement of control measures, which in turn depends on the local government’s management capacities. Specifically, government efficiency, capacity for law enforcement, and the transparency of laws and policies significantly reduce COVID-19 prevalence and increase the likelihood of recoveries. The organisation size of the government, which is not closely related to its capacity for management, has a limited role.

Cake-cutting is a longstanding metaphor for a wide range of real-world problems that involve the division of anything of value. Unsurprisingly, where owners of a strata scheme wish to end the strata scheme and collectively sell their development, one of the most contentious issues may be the apportionment of sale proceeds. In Singapore, this problem is compounded in mixed developments which have both commercial and residential elements as well as in developments with different sized units, often with disproportionate strata share values; even differing facings and the state of one’s unit may attract disenchantment when trying to apportion proceeds. This article critically analyses how New South Wales (NSW) and Singapore allocate proceeds pursuant to a collective sale of strata property. In this respect, the Strata Schemes Development Act 2015 (NSW) and Strata Schemes Management Act 2015 (NSW) are significantly clearer than Singapore’s Land Titles (Strata) Act (Cap 158) as the latter does not prescribe any statutory formula for apportionment. In examining the jurisprudence and respective strata frameworks, this article proposes how proceeds in a collective sale could be more fairly apportioned.

This paper considers how the (de)territorialised appeal of international schools in China can reflect, enforce and expand pre-existing patterns of urban segregation. Whilst exploration of the effects of educational marketplaces on urban environments has become a focus of scholarly research, the recent expansion in the supply of, and demand for, international education has caused these effects to become more nuanced. As (de)territorialised entities, international schools can cause multiple forms of spatial and psycho-social distinction and (dis)association to become intertwined, the effects of which start from the school and radiate out from there. International schools can therefore cause segregation to become a structurally entrenched phenomenon. These ideas are illustrated through an empirical examination of three international schools located in the eastern Chinese city of Suzhou. We explore the ways in which these schools are branded spaces that reproduce socio-spatial boundaries and thus foster a (de)territorialised sense of inter-belonging amongst their students.

In this article, we survey a growing body of literature within geography and other intersecting fields that trains attention on what inclusive smart cities are, or what they could be. In doing so, we build on debates around smart citizens, smart public participation, and grassroots and bottom-up smart cities that are concerned with making smart cities more inclusive. The growing critical scholarship on such dis- courses, however, alerts us to the knowledge politics that are involved in, and the urban inequalities that are deeply rooted within, the urban. Technological interventions con- tribute to these politics and inequalities in various ways. Accordingly, we discuss limitations of the current discourses around inclusive smart cities and suggest a need for a nuanced definition of ‘inclusiveness’. We also discuss the necessity to further engage with critical data studies in order to ‘know’ what we are critiquing.

This paper quantitatively studies the local welfare impacts of inter-city migration in China. We structurally estimate a trade model with endogenous migration decisions using data from 279 prefecture-level cities. The results suggest that inflows of migrant workers increase welfare in the destination cities between 2000 and 2005 despite their negative impacts on congestion and nominal wage. The positive local impacts of migration depend crucially on the endogenous firm entry. The positive impacts in the destination cities also spill over to the neighboring cities through inter-city trade, often leading to higher welfare gains in the nearby cities than the destination cities themselves. We also show that further relaxing the Hukou restrictions in the largest Chinese cities is welfare-improving to the local residents.

Quantifying the economic benefits of built heritage facilitates the formulation and assessment of conservation policies and programs. There is however a lack of empirical research about the economic value of built heritage in Asian cities. This lack is problematic, given the rapid pace of demolition and redevelopment of historic landscapes in Asian cities. This study seeks to reduce the current gap in built heritage research by examining whether real estate premiums are generated by the designation of buildings as ‘conserved’ in Singapore, a city-state in South East Asia. Using 20 years of housing transaction data, and controlling for building, neighborhood and year fixed effects, we found that conservation designation had a positive impact on average sale prices per square meter of built area that was largest at residential locations between 800 m to 1.6 km from the conserved site. Findings also suggest that lower-cost public housing resale units gained a substantially smaller premium compared to private housing units. While our findings suggest an economic justification for building conservation programs in Asian cities, they also raise questions about such programs potential impact on neighborhood gentrification, and the need for appropriate taxation policies to ensure horizontal equity between property owners.

This paper argues that the divergent logics of “smartness” and “sustainability” can lead to parallel regimes of sustainability. Whilst sustainability is often used to justify the need for smart cities, smart cities are often undermined by the neoliberal logics of digital governance. Moreover, because the intersection of digital technologies and society is a negotiated one, smart solutions often fail to provide adequate solutions to social problems. This is especially true when smart solutions are used to augment or replace hitherto human-centred processes, like caregiving.Parallel regimes of sustainability are a response to these failures. Drawing on an analysis of a trial of in-home smart eldercare technologies in Singapore, four binary pairings – public-private, individual-community, remote-proximate and passive-active – are used to define the parallel regimes of sustainable eldercare that emerged in response to smart technologies. To conclude, the need for urban paradigms to evolve in conversation with society is emphasised.