Assessment of mobility inequalities and income data collection. Methodological issues and a case study (Douala, Cameroon)

Lourdes Diaz Olvera (), Didier Plat () and Pascal Pochet ()
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Lourdes Diaz Olvera: LET - Laboratoire d'économie des transports - UL2 - Université Lumière - Lyon 2 - ENTPE - École Nationale des Travaux Publics de l'État - CNRS - Centre National de la Recherche Scientifique
Didier Plat: LET - Laboratoire d'économie des transports - UL2 - Université Lumière - Lyon 2 - ENTPE - École Nationale des Travaux Publics de l'État - CNRS - Centre National de la Recherche Scientifique
Pascal Pochet: LET - Laboratoire d'économie des transports - UL2 - Université Lumière - Lyon 2 - ENTPE - École Nationale des Travaux Publics de l'État - CNRS - Centre National de la Recherche Scientifique

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Abstract: In order to understand the scale and nature of inequalities in intra-urban mobility we need reliable income data, but this is generally difficult to collect in household surveys. The methodological approaches that are employed to overcome difficulties in income data collection may affect the relative position of individuals and households within the income distribution and our estimates of mobility inequalities. In the context of a case study of Douala, this paper evaluates how the way income data is collected affects its accuracy and therefore the measurement of daily mobility inequalities. Simplified data collection tends to minimise the scale of inequalities as it misrepresents the income distribution. The error is greater in remote zones. Shortcomings in the statistical apparatus with regard to income data thus blur our perception of mobility inequalities and impede investigation of the links between daily travel, poverty and social exclusion.

Keywords: mobility inequality; sub-Saharan Africa; Household travel survey; income data collection; daily mobility; transport expenditure (search for similar items in EconPapers)
Date: 2015
Note: View the original document on HAL open archive server: https://shs.hal.science/halshs-01205776
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Citations: View citations in EconPapers (4)

Published in Journal of Transport Geography, 2015, 46, pp.180-188. ⟨10.1016/j.jtrangeo.2015.06.020⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:halshs-01205776

DOI: 10.1016/j.jtrangeo.2015.06.020

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