This paper provides a critical review of the literature on non-market valuation methods to estimate the welfare impact of novel products; it is the first study to assess both observed data- and perception-based methods as non-market valuation methods. Observed databased methods include budgets,...

Mali is a Sub-Saharan African country with 19.1 million people. Almost half of this population lives in poverty, due to the dysfunction of activity sectors (agriculture, energy, education, employment, services, etc.). Natural resource management especially land and water together with...

Household characteristics are commonly used to explain variation in smallholderefficiency levels. The underlying assumption is that differences in intended behaviorare well described by such variables, while there is no a priori reason that this is thecase. Moreover, heterogeneity in farmer...

Vegetable plays important roles in the socio-economic development in West Africa. It contributes to insuring food security, provides raw materials for local industries, generates foreign exchange and provides employment and incomes for most of the population. However some health hazards are...

Mali is a Sub-Saharan African country with 19.1 million people. Almost half of this population lives in poverty, due to the dysfunction of activity sectors (agriculture, energy, education, employment, services, etc.). Natural resource management especially land and water together with...