This Paper highlights a problem in using the first-differenced GMM panel data estimator to estimate cross-country growth regressions. When the time series are persistent, the first-differenced GMM estimator can be poorly behaved, since lagged levels of the series provide only weak instruments...

Much African land currently has low productivity and has attracted investors purchasing (or leasing) land as a speculative option on higher future prices or productivity. If land deals are to be beneficial they need to induce productivity enhancing investments. Some of these will be publicly...

For Africa, a regional customs union is unlikely to realise net welfare gains (in the sense of trade creation dominating trade diversion) which cannot be attained through unilateral trade liberalization. Unilateral reform has often failed in Africa, however. A regional customs union tied to...

Where imports are financed predominantly by rents from resource extraction or aid, the revenue generated by tariffs is illusory. Revenue earned by the tariff is offset by a reduction in the real value of aid and resource rents. Revenue is however moved between accounts in the government budget,...

This paper argues that the contribution of trade preferences to economic development needs to be reappraised in light of the growth of globalized trade in manufactures. Trade preferences may be able to act as a catalyst for manufacturing exports, leading to rapid growth in exports and...