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VERSION:2.0
PRODID:-//AMSE//Event Calendar//FR
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UID:event-13116@www.amse-aixmarseille.fr
DTSTAMP:20260429T125848Z
CREATED:20260429T125848Z
LAST-MODIFIED:20260429T125848Z
STATUS:CONFIRMED
SEQUENCE:0
SUMMARY:phd seminar - Anisha Ghosh*\, Marco Matani**
DTSTART:20260505T090000Z
DTEND:20260505T101500Z
DESCRIPTION:*This study investigates whether Ramadan adherence reduces dome
 stic violence against children. According to UNICEF (2024)\, two-thirds of 
 children regularly experience violent punishment at home. High fertility ra
 tes in predominantly Christian and Muslim countries\, together with the Isl
 amic “youth bulge” also suggest that by 2050\, the majority of young pe
 ople will have been raised in a religious household (Pew Research Center\, 
 2025). By leveraging the rotating timing of Ramadan\, I evaluate how ritual
  preparation and intensity affect reports of child punishment across a larg
 e sample of Muslim adherents\, non-adherents\, and non-Muslims across Egypt
 \, Nigeria\, and the United States. Satellite-based night-time light data f
 rom the Visible Infrared Imaging Radiometer Suite (VIIRS) provides an addit
 ional measure of Ramadan adherence by capturing the shift of daytime activi
 ties to nighttime hours. Estimating the pre-Ramadan period separately also 
 helps disentangle the effects of fasting-related fatigue from those of reli
 giously motivated restraint or forgiveness. This approach builds on recent 
 work using Ramadan timing as a source of exogenous variation in behavior an
 d decision-making\, while extending it by incorporating a high-resolution s
 patial measure of religious activity.**The present project frames a (revisi
 ted) proximity-concentration trade-off of multinational firms within a Rica
 rdian-Heckscher-Ohlin model with variable markups (arising from VES prefere
 nces) and multiproduct firms. If frictions on new varieties are higher when
  producing abroad\, firms choosing between foreign subsidiaries and exports
  weigh the resulting increase in marginal costs against the benefits of avo
 ided trade frictions and possible input price differences. The varieties pr
 oduced as multinationals are those closer to the firms’ core competency\,
  that is\, those produced more efficiently. When multinational operations r
 equire additional fixed costs\, a novel mechanism obtains under VES compare
 d to CES. Variable markups imply that\, for the less productive firms\, sma
 ller market shares are compensated by more salient marginal cost reductions
 . Multinational production is thus optimal for firms that are both producti
 ve enough to hold sufficiently large market shares and unproductive enough 
 for cost reductions to significantly affect markups on foreign sales. The m
 ost and least productive firms with access to the foreign market remain pur
 e exporters. To the best of my knowledge\, this is the first model to chara
 cterize firms’ location choices in a setting of monopolistic competition 
 with variable markups. The implications are both theoretical and empirical.
  While domestic firm selection is still driven by Ricardian comparative adv
 antage\, the role of relative input prices becomes less straightforward tha
 n in trade-only models. Empirically\, the model calls for alternative appro
 aches to studying multinational status and productivity beyond pooled linea
 r regressions.\\n\\nContact: Xavier Chatron-Colliet: xavier.chatron-colliet
 [at]univ-amu.frArmand Rigotti: armand.rigotti[at]univ-amu.fr\n\nPlus d'info
 rmations: https://www.amse-aixmarseille.fr/en/events/anisha-ghosh-marco-mat
 ani
LOCATION:MEGA - Salle Carine Nourry\, 424\, Chemin du Viaduc\, 13080 Aix-en
 -Provence
URL;VALUE=URI:https://www.amse-aixmarseille.fr/en/events/anisha-ghosh-marco-matani
CONTACT:Xavier Chatron-Colliet: xavier.chatron-colliet[at]univ-amu.frArmand
  Rigotti: armand.rigotti[at]univ-amu.fr
TRANSP:OPAQUE
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