We introduce skewed Lévy models, characterized by a symmetric jump measure multiplied by a damping exponential factor. These models exhibit a clear implied volatility pattern, where the damping parameter controls the implied ...

In this paper we quantify the effects of horizontal mergers in the supermarket sector that took place in the US between 2003 and 2005. We contribute to the growing literature on ex-post merger evaluations in three ways: ...

The literature shows that Petrobras's specialized knowledge in deep-water exploration helped it maintain its dominance of the oil sector in Brazil. This article contributes to the literature by throwing light on how this ...

We analyze competitive economies with risky investments. Unlike the classic Arrow-Debreu framing, firms and agents cannot contract upon the exogenous states underlying production risks. They can trade equities and any ...

The present article deals with the initial formation of teachers in Brazil from 2000 to 2015. Using data from the census of Higher Education for these 15 years, we analyzed the supply of courses and the volume of enrollments ...

Given the speed of air travel, diseases even with a short viremia such as dengue can be easily exported to dengue naïve areas within 24 hours. We set out to estimate the risk of dengue virus introductions via travelers ...

Purpose: The purpose of this paper is to analyze how companies develop mitigation capabilities in their supply chains in order to reduce the negative impacts of counterfeiting. Design/methodology/approach: Five cases with ...

Targeted sanctions are increasingly used by the United Nations (UN) Security Council to address major challenges to international peace and security. Unlike other sanctions, those imposed by the UN are universally binding ...

This paper proposes a classification of economic models into three types: historical, axiomatic and conditional. Historical or empirical models utilize the historical-deductive method, and are generalizations from the ...