South Asia remains one of the major strongholds of hunger in the world, despite the fact that, following the Green Revolution, cereal production in the countries of this region tripled during the second half of the 20th century. This study examines the role played by this increase in cereal production in improving the region's nutrition and food security situation. We study the association between the different aspects of food security and cereal production in South Asia that have prevailed over the past 25 years. We find a beneficial role of the production and yield of cereals in lowering the extent of undernourishment. A 1% increase in cereal production and yield is associated with up to 0.84% decrease in the prevalence of undernourishment. The impact is significant over a period of 3 years. The positive effect is particularly evident in the case of rice and maize production. An improvement is seen in the aspects of availability, stability, and utilization of food security but not in the aspect of access. These findings are robust to alternative specifications and techniques. The results explain, in part, the means by which South Asian nations have managed to stall relative increases in extreme hunger and food insecurity.

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Africa is the world's biggest battleground in the fight against hunger. African governments and the international development community have increasingly focused on finding ways and means to end hunger and ensure the right to food to the continent's burgeoning population. Public spending on agriculture is one such measure. This study examines the role government spending on agriculture has played in enhancing Africa's state of food security during the past 25 years. We examine whether this relationship varies over time and space. We explore various aspects of food security and check whether spending on research and development follows the same patterns as the overall public agriculture spending. We find little evidence of significant beneficial effects of public agricultural spending on food security as a whole. However, food security has improved in countries which spend more on agriculture. Spending on agricultural research and development too has shown a useful impact on Africa's food security. There also exists some evidence in favour of public spending's size and time effects. We conclude that the commitment by African government in the Maputo Declaration to allocate 10% of public spending to agriculture appears to be pertinent.

Airbnb répond à des changements sociétaux et s’inscrit dans un contexte d’évolution des modes de tourisme. Partout dans le monde, de plus en plus de voyageurs utilisent des plateformes d’économie collaborative comme Airbnb. Notre étude met l’accent sur un hôtel indépendant en Nouvelle-Aquitaine et répond à la question suivante : quel est l’impact de l‘arrivée des plateformes telles qu’Airbnb sur un hôtel indépendant ? Pour mener à bien notre recherche, nous avons réalisé pendant quatre années une étude de cas longitudinale de nature exploratoire sur trois membres d’une même famille liée à l’entreprise étudiée. Nous montrons alors le processus par lequel l’entreprise a réalisé un repositionnement stratégique radical et un changement total de business model puisque les chambres de l’hôtel ont été transformées en appartements loués sur la plateforme Airbnb.