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Foods are complex systems that need to be properly preserved to maintain their quality. Bacteria can alter food and if they are pathogenic, can cause a lot of illness in the consumers. The use of synthetic preservatives is increasingly rejected by consumers due to their side effects. For this rea...

Los alimentos son sistemas complejos que requieren ser conservados adecuadamente para mantener su calidad. Las bacterias alteran los alimentos y si son patógenas, pueden llegar a causar una gran cantidad de enfermedades en los consumidores. El uso de preservantes sintéticos es cada vez más rechaz...

In this thesis, theoretical aspects and applications in economics of the Principal-Agent model are studied. The first part of the thesis presents two applications of the model. In the first one, an electricity provider determines the optimal tariff of consumption for its clients. Population is he...