Skewness premium with Lévy processes

We study the skewness premium (SK) introduced by Bates [J. Finance, 1991, 46(3), 1009–1044] in a general context using Lévy processes. Under a symmetry condition, Fajardo and Mordecki [Quant. Finance, 2006, 6(3), 219–227] obtained that SK is given by Bates' x% rule. In this paper, we study SK in the absence of that symmetry condition. More exactly, we derive sufficient conditions for the excess of SK to be positive or negative, in terms of the characteristic triplet of the Lévy process under a risk-neutral measure.     

Time discounting for primary and monetary rewards

This paper reports a positive and statistically significant relation between short-term discount rates elicited with a monetary and a primary reward (chocolate). This finding suggests that high short-term discount rates are related to an underlying individual trait.     

Broadband use and trade facilitation: Impacts on bilateral trade of sub-Saharan countries

This paper investigates the direct and combined impacts of trade facilitation and information and communication technology (ICT) on bilateral flows of 25 sub-Saharan countries. For that purpose, we select time to export and import as specific trade facilitation indicators and broadband use to study ICT impacts. Our sample covers a total of 93 countries over the period 2004–2018. By preprocessing data analysis, we impute time costs missing values, an essential shortcoming of the available databases, to study trade facilitation over time. Lastly, we employ a gravity model and implement a Bonus Vetus Estimation. Our results show that broadband use exerts a positive and significant effect on trade, especially relevant for intra-African trade flows. Furthermore, the combined effects indicate that broadband also modulates the negative impacts of time to export and time to import in the case of intra-SSA countries' trade. The more significant result is found for time to export. Our results also confirm that time costs are not only particularly harmful to intra-African trade but also negatively impact trade flows from SSA countries to the rest of the world. These outcomes show the importance of coordinating trade facilitation and digital transformation policies, particularly those devoted to digitally transforming African customs.