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                <term xml:lang="en">Development</term>
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                <term xml:lang="fr">Pauvreté</term>
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              <p>This paper questions the Lewis Path perspective of a "world without agriculture" which underpins the "structural transformation" paradigm of "modern growth." It shows that the Lewis Path is only one of four potential structural paths, and that half of the world's population is spiralling into a "Lewis Trap" with more farmers and an increasing income gap between them and other workers. After showing how land constraints and the productivity dynamics outside agriculture might prevent this population from switching to a Lewis Path, it delineates the condition of an alternative path that would not transfer the disparity problem to cities.</p>
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              <p>Cet article interroge le paradigme de " transformation structurelle " et de " croissance moderne " qui conduit in fine à un " monde sans agriculture ". Il montre d'abord que ce " chemin de Lewis " (Lewis Path) n'est qu'une voie parmi quatre possibles, et que seuls les pays industrialisés ou en transition l'ont suivi durant les dernières décennies. La moitié de la population mondiale est plutôt embarquée dans une direction diamétralement opposée (Lewis Trap) où la population active agricole croît ainsi que son écart de revenu avec les autres travailleurs. En recomposant les productivités partielles de la terre et du travail en calories de 1961 à 2007, l'article montre ensuite comment la contrainte en terre interdit à la plupart des actifs agricoles d'augmenter la productivité de leur travail par la moto-mécanisation à grande échelle. Enfin, des simulations numériques projetant l'Inde en 2050 montrent quels facteurs extérieurs à l'agriculture barrent la route de Lewis à ce pays et d'autres. L'article introduit et discute alors un autre paradigme de développement, celui d'une intensification écologique hautement productive à petite échelle, intensive en travail comme en savoirs génériques et locaux, insérée dans le secteur manufacturier comme dans celui des services.</p>
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