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Abstract
Interlocked relationships are characterised by traders’ supply of inputs and cash to producers
on credit, to be reimbursed at sale time based on a pre-defined price which is often lower than
the prevailing market price. The study analyses determinants of choice of interlocking in the
gum sector in Senegal and the effect of interlocking on market participation and gum
production. Data from 422 gum producers in Northern and Eastern regions of Senegal are
used. About 41% of respondents are involved into interlocking with village shop-owners or
mobile traders. Interlocking positively influences market participation and production as
found through a Heckman selection model.