Recent conceptualizations of ‘food deserts’ have expanded from a sole focus on access to supermarkets, to food retail outlets, to all household food sources. Each iteration of the urban food desert concept has associated this kind of food sourcing behavior to poverty, food insecurity, and dietary diversity characteristics. While the term continues to evolve, there has been little empirical evidence to test whether these assumed associations hold in cities of the Global South. This paper empirically tests the premises of three iterations of the urban food desert concept using household survey data collected in Nairobi, Kenya, and Mexico City, Mexico. While these associations are statistically significant and show the expected correlation direction between household food sourcing behavior and food security, the strength of these relationships tends to be weak. These findings indicate that the urban food desert concept developed in North American and UK cities may have limited relevance to measuring urban food insecurity in the Global South.
Africa is rapidly urbanising and urban food systems are being transformed. Some have argued that this transformation is driven by a supermarket revolution akin to that in North America, Europe and Latin America. Others suggest that the supermarket revolution model oversimplifies complex African realities and that urban food systems are experiencing uneven supermarket penetration in the face of resilient informal food sectors. This paper focuses on Windhoek, Namibia, showing that the city's food system is dominated by South African and local supermarket chains. Since the end of apartheid, South African supermarket chains have expanded their operations into Namibia. Supermarket domination of Windhoek's urban food system is a function of proximity of South Africa and integration into South African supply chains. In other African countries, supermarket penetration has been much slower and is even being reversed. Explanations for uneven penetration in different countries require greater contextualisation and more case study research.
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