Browsing by Author "Martins, J."
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- An Economical Model For Dumping by Dumping in a Cournot ModelPublication . Banik, Nilanjan; Ferreira, Fernanda A.; Martins, J.; Pinto, Alberto A.We consider an international trade economical model where two firms of different countries compete in quantities and can use three different strategies: (i) repeated collusion, (ii) deviation from the foreigner firm followed by punishment by the home country and then followed by repeated Cournot, or (iii) repeated deviation followed by punishment. In some cases (ii) and (iii) can be interpreted as dumping.We compute the profits of both firms for each strategy and we characterize the economical parameters where each strategy is adopted by the firms.
- Scaling of Stochasticity in Dengue Hemorrhagic Fever EpidemicsPublication . Aguiar, M.; Kooi, B.W.; Martins, J.; Stollenwerk, N.In this paper we analyze the stochastic version of a minimalistic multi-strain model, which captures essential differences between primary and secondary infections in dengue fever epidemiology, and investigate the interplay between stochasticity, seasonality and import. The introduction of stochasticity is needed to explain the fluctuations observed in some of the avail- able data sets, revealing a scenario where noise and complex deterministic skeleton strongly interact. For large enough population size, the stochastic system can be well described by the deterministic skeleton gaining insight on the relevant parameter values purely on topological information of the dynamics, rather than classical parameter estimation of which application is in general restricted to fairly simple dynamical scenarios.