This paper addresses the integration of ill-know requirements (imprecision or uncertainty on f quantities or due dates) in a requirement plan (expressed in terms of quantities by periods). Ill-known requirements may come from a customer of the supply chain (forecast orders) or from a...

As in [3], we study the deterministic optimization problem of a profit-maximizing firm which plans its sales/production schedule. The firm knows the revenue associated to a given level of sales, as well as its production and storage costs. The revenue and the production cost are assumed to be...

In this paper, we study a multi-periodic production planning problem in agriculture. This problem belongs to the class of crop rotation planning problems, which have received increased attention in the literature in recent years. Crop cultivation and fallow periods must be scheduled on land...

This paper investigates whether the exam success rate in Africa increases significantly in the months prior to the occurrence of the presidential elections. It hypothesizes that the incumbent is tempted to increase the exam success rate to retain a form of social cohesion and to 'buy' votes. A...

The paper analyses the economic relationships between China and Sub-Saharan African countries, including original contractual relationships that link exports from Sub-Saharan Africa to China and investment by Chinese firms in Sub-Saharan Africa. Unlike the 'traditional' partners of Sub-Saharan...

In this paper, we first, perform a quantitative assessment of the impact of the HIV/AIDS epidemic on growth. Second, we precisely account for the effects of the epidemic on income per capita through human and physical capital accumulations, population and labor force. That is, we disentangle the...

We examine the middle-run eff ects of the Global Fund's malaria control programs on the educational attainment of primary schoolchildren in Sub-Saharan Africa. Using a quasi-experimental approach, we exploit geographic variation in pre-campaign malaria prevalence (malaria ecology) and variation...

This paper examines access to the city as revealed by the daily travel behaviour of urban dwellers. It is based on secondary analyses of six household travel surveys carried out in cities in West and Central Africa between 1992 and 2003. Vehicle ownership rates are low in these cities and the...

In Sub-Saharan Africa the cost of transport faced by city dwellers, particularly the poor, tends to add to their travel and economic difficulties. Knowledge of the burden of transport expenditure in the household budget seems essential for passenger transport policy formulation in order to...

This paper focuses on the sources and consequences of the instability of tax revenue in Sub-Saharan African countries. We take advantage of a unique and extraordinarily rich dataset on the composition of tax revenues for a large number of countries. Using panel data for 39 countries observed...