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AbstractThe city is both a carrier and a subject of innovation. Based on the triple helix theory of industry–university research and the theory of spatial correlation, this study constructs a collaborative innovation framework both within the cities and between cities, and uses a network data envelopment analysis (DEA) model and spatial econometric model to measure and analyze the collaborative innovation efficiency in 75 innovative cities in China. The results show that collaborative innovation efficiency within cities is on the rise, and the efficiency of "research to production" is significantly higher than that of "learning to research." Industrial structure and foreign factors have inhibited the efficiency improvements, and infrastructure and living standards have different promoting effects on different stages of efficiency. Between cities, capital flows have obvious spillover effects, which promote the efficiency of innovation networks, while the long‐term characteristics of institutional learning have a near‐term negative impact.

AbstractProgrammes of organized, political violence have always been legitimized and sustained through complex imaginative geographies. These tend to be characterized by stark binaries of place attachment. This article argues that the discursive construction of the Bush administration's 'war on terror' since September 11th 2001 has been deeply marked by attempts to rework imaginative geographies separating the urban places of the US 'homeland' and those Arab cities purported to be the sources of 'terrorist' threats against US national interests. On the one hand, imaginative geographies of US cities have been reworked to construct them as 'homeland' spaces which must be re‐engineered to address supposed imperatives of 'national security'. On the other, Arab cities have been imaginatively constructed as little more than 'terrorist nest' targets to soak up US military firepower. Meanwhile, the article shows how both 'homeland' and 'target' cities are increasingly being treated together as a single, integrated 'battlespace' within post 9/11 US military doctrine and techno‐science. The article concludes with a discussion of the central roles of urban imaginative geographies, overlaid by transnational architectures of US military technology, in sustaining the colonial territorial configurations of a hyper‐militarized US Empire.