trade costs
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Intranational trade barriers and firm productivity: Evidence from India
Highway construction in India improved productivity by inducing firms to focus on products in which they are most efficient
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Upgrading outputs means upgrading inputs
Success when exporting to richer countries requires upgrading the quality of products, but also of inputs
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How high intra-national trade costs limit the gains of globalisation
High trade costs and mark-ups on transportation within African countries reduce the surplus and market access of remote consumers