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VERSION:2.0
PRODID:-//AMSE//Event Calendar//FR
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UID:event-9952@www.amse-aixmarseille.fr
DTSTAMP:20260430T013413Z
CREATED:20260430T013413Z
LAST-MODIFIED:20260430T013413Z
STATUS:CONFIRMED
SEQUENCE:0
SUMMARY:phd seminar - Aisha Salih*\, Guillaume Bataille**
DTSTART:20230411T090000Z
DTEND:20230411T101500Z
DESCRIPTION:*This ongoing project explores the relationship between climate
  uncertainty in agrarian settings and the demand for “religious insuranc
 e”. We test how religiosity and religious participation respond to climat
 e shocks caused by long-onset climate change. We exploit two main datasets:
  the World Bank's General Household Panel Survey in Nigeria\, and the Stand
 ardized Precipitation Evapotranspiration Index which estimates drought prob
 ability and severity. As an additional proxy of religiosity\, we use Night 
 Lights data as a measure of adherence to Ramadan. We then investigate how t
 his relationship interacts with formal insurance and other forms of risk sh
 aring. This work contributes to the recent literature using quasi-exogenous
  methods and spatial econometrics to study religion.**This study investigat
 es the effectiveness of a prey-refuge policy in regulating harvesting activ
 ities within a predator-prey system. Building upon existing literature\, I 
 first derive a tractable model for the simultaneous exploitation of a preda
 tor-prey system\, in which a constant proportion of the prey population is 
 protected by the refuge. Assuming selective harvesting and competition amon
 g fisheries\, I demonstrate the existence of a Feedback-Nash symmetric equi
 librium in linear strategies. Next\, given the trajectories of fisheries' h
 arvests over time\, I investigate the regulator's optimal choice of the pro
 portion of protected prey in order to maximize the discounted sum of aggreg
 ate welfare. Using numerical simulations\, I find that there exists a thres
 hold for the share of protected prey that maximizes the aggregate welfare o
 f both prey and predator fisheries. Protecting a small proportion of prey f
 rom predation benefits both the prey and predator stocks\, as it increases 
 the food availability for predators. However\, as the proportion of protect
 ed prey becomes large enough\, the predator's population decreases due to r
 educed access to prey\, even if the prey stock remains large. Therefore\, t
 he aggregate welfare of the system may decrease with the size of the refuge
 . My findings suggest that protecting an appropriate proportion of prey fro
 m natural predation can increase the economic efficiency of the fishery in 
 a second-best world\, and non-market based instruments such as artificial r
 eefs may be utilized for fisheries management.\\n\\nContact: Camille Hainna
 ux : camille.hainnaux[at]univ-amu.frDaniela Horta Saenz : daniela.horta-sae
 nz[at]univ-amu.frJade Ponsard : jade.ponsard[at]univ-amu.frNathan Vieira : 
 nathan.vieira[at]univ-amu.fr\n\nPlus d'informations: https://www.amse-aixma
 rseille.fr/fr/evenements/aisha-salih-guillaume-bataille
LOCATION:MEGA - Salle Carine Nourry\, 424\, Chemin du Viaduc\, 13080 Aix-en
 -Provence
URL;VALUE=URI:https://www.amse-aixmarseille.fr/fr/evenements/aisha-salih-guillaume-bataille
CONTACT:Camille Hainnaux : camille.hainnaux[at]univ-amu.frDaniela Horta Sae
 nz : daniela.horta-saenz[at]univ-amu.frJade Ponsard : jade.ponsard[at]univ-
 amu.frNathan Vieira : nathan.vieira[at]univ-amu.fr
TRANSP:OPAQUE
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