Does better accessibility help to reduce social exclusion? Evidence from the city of São Paulo, Brazil

Gregório Luz, Matheus H.C. Barboza, Licinio Portugal, Mariana Giannotti and Bert van Wee

Transportation Research Part A: Policy and Practice, 2022, vol. 166, issue C, 186-217

Abstract: Most transport equity and transport-related social exclusion (TRSE) studies assume that increasing accessibility levels lead to increased activity participation and, therefore, a reduction in social exclusion. Although this assumption makes sense from a theoretical point of view, this causal relationship has not yet been validated in practice. Previous studies investigating the accessibility-participation relationship were inconclusive, indicating that increasing accessibility has a limited impact on activity participation levels, if any. Moreover, the existing empirical evidence in the literature in the Global South context is scarce, is merely correlational and fails to infer causality between both variables. The contributions of the paper are threefold. First, (a) to provide a conceptual model of the causal relationship between accessibility, activity participation and risk of transport-related social exclusion (TRSE); second, (b) to summarise the available empirical evidence about the accessibility-activity participation relationship through a systematic literature review; and third, (c) to provide evidence of the causal relationship between accessibility and activity participation levels in a Global South context. Three Poisson regression models associated with an instrumental variable identification strategy were used to assess the causal effect between accessibility and participation in total, mandatory and discretionary activities in the city of São Paulo, Brazil. The three models showed a highly significant, strong correlation between an individual’s accessibility level and their actual participation in total, mandatory and discretionary activities. Models that ignore the possible endogeneity present in the relationship between accessibility and activity participation may underestimate the effect of accessibility. Based on our results, we argue that low accessibility levels may severely restrict individuals’ life chances and add evidence that accessibility has to be an important instrument to support transport policies' decision-making.

Date: 2022
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DOI: 10.1016/j.tra.2022.10.005

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