A generalized model for population dynamics where interactions change over time por Stucchi, Luciano, Martín-Gutíerrez, Samuel, Galeano, Javier, Pastor, Juan Manuel

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Linear decompositions of cognitive achievement gaps a cautionary note and an illustration using Peruvian data por Castro, Juan Francisco

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Colusión sin evidencia directa en el Perú ¿la sospecha basta? por Defilippi, Enzo

“…However, a deeper look at the economic evidence of the case shows that it was not conclusive, since the collusion hypothesis cannot explain key facts: the reason for which the firms disqualified themselves, since the others did not require it to win the tenders; the reason why the firms would maintain a collusive agreement that could not provide higher benefits than competition; and the price evidence that shows ESSALUD was exerting market power at the same time it was the supposed victim of a collusion. Likewise, the collusion hypothesis implies that the behavior of the firms was irrational, since i) a producer representing 85% of the market colluded with two firms representing 10% and 5%, ii) to allow them to gain market share at its expense, iii) to sell the product at increasingly lower prices than those paid by the rest of buyers, iv) through contracts obtained bidding the lowest possible price. …”
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