The lighter superpartner of the top quark (t 1 ) may be considerably lighter than squarks of the first two generations, and hence may be accessible to Tevatron collider searches, even if the other squarks and the gluino are too heavy. For the range of mt 1 of interest at the Tevatron, thet 1 decays to a chargino viat 1 → b W 1 if this is kinematically allowed; otherwise, the flavorchanging loop decayt 1 → c Z 1 dominates. In the latter case,t 1 production is signalled by jet(s) plus E / T events. If, instead, the chargino decay is allowed, 1ℓ + b-jets + E / T and ℓ + ℓ ′− + jet(s) + E / T events from leptonic decays of W 1 provide the most promising signals. We perform detailed simulations for each of these signals using ISAJET 7.07 and devise cuts to enable the extraction of each of these signals above standard model backgrounds from vector boson or top quark production. With an integrated luminosity of 100 pb −1 , experiments should be able to probe top squark masses up to ∼ 100 GeV in each of these channels; the detection of the signal in the single lepton channel, however, requires reasonable capability to tag displaced b decay vertices in the central region.

Many recent arguments for land reform share a central proposition concerning the relative efficiency of small farm production. This article argues that the theoretical reasoning underlying this proposition is not coherent, and furthermore the empirical support for this size–efficiency relationship in Africa is astonishingly weak. Given the evidence, the continued focus on the efficient, egalitarian family farm can only be ideologically driven. The poorest rural people are unlikely to benefit and will probably be harmed by the policies based on these arguments for land reform. To illustrate this point, the article considers data from land redistribution programmes, particularly in South Africa, that suggest not only that the poorest did not acquire land, but also that they suffered declines in rural wage earning opportunities that are crucial for their survival.

This paper presents some results from the largest rural labour market survey yet conducted in Mozambique. Evidence from three provinces shows that labour markets have a significant impact on the lives of a large number of poor people, and that employers exercise considerable discretion in setting wages and conditions of casual, seasonal and permanent wage employment. The evidence presented comes from a combination of a quantitative survey based on purposive sampling with other techniques, including interviews with large farmers. The findings contrast with ideas that rural labour markets are of limited relevance to poverty reduction policy formulation in Africa, and the paper concludes with methodological, analytical and policy recommendations.

Historical and micro-survey evidence, as well as the standard data from international organizations, support less pessimistic conclusions on Africa's development performance than those reached by many social scientists. The changes that have benefited women over the last four decades are highlighted; a discussion of growth in agricultural production follows. However, the complexity and the brutality of processes of social and economic change in Sub-Saharan African economies are also stressed. The theoretical implications of these complexities have not been adequately analyzed by World Bank economists. The Bank's recent efforts to reassess its policies are, therefore, unlikely to achieve the results anticipated.