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BEGIN:VEVENT
UID:event-9149@amse-aixmarseille.fr
DTSTAMP:20260430T142630Z
CREATED:20260430T142630Z
LAST-MODIFIED:20260430T142630Z
STATUS:CONFIRMED
SEQUENCE:0
SUMMARY:phd seminar - Robin Ng*\, Keiti Kondi**
DTSTART:20220503T090000Z
DTEND:20220503T101500Z
DESCRIPTION:*Recent evidence suggests online ratings and reviews are intrin
 sically motivated and reviewers reciprocate offers of sufficient value-for-
 money with good ratings. We incorporate reciprocity into a model of ratings
 \, where consumers rate positively if they receive a high value-for-money a
 nd perceive firms to be sufficiently kind. Our key mechanism is that to ben
 efit from reciprocity\, firms offer lower prices in exchange for good ratin
 gs\, increasing future prices and profits. Firms reinforce this mechanism a
 nd are more likely to induce good ratings when i) consumers exhibit a stron
 ger sense of reciprocity or when ii) it is easier for consumers to leave ra
 tings. This way\, the presence of reciprocity can explain the documented ph
 enomenon of rating inflation\, and less informative ratings\, especially as
  it becomes easier to leave ratings. We discuss how further marketplace fea
 tures affect the reciprocity mechanism and the informativeness of ratings: 
 First\, a two-sided platform might indeed choose to make it easier for cons
 umers to rate\, thereby undermining the informativeness of ratings. Second\
 , many platforms screen the quality of sellers and kick out low-quality sel
 lers. We characterize when such quality screening reduces or reinforces the
  informativeness of ratings. Third\, competition between sellers leads to l
 ower informativeness of ratings. Finally\, we show that more-informative ra
 tings do not necessarily translate to larger consumer surplus.**Among Europ
 ean countries Albania has by far the highest sex ratio at birth with 1.12 b
 oys per girls\, compared to the European average of 1.058. Considering this
  disbalance\, the aim of this paper is to analyze a mechanism that can lowe
 r the sex ratio by implementing policies that eliminate the sex bias in par
 ents preferences for children and the gender gap in intra-household bargain
 ing. We focus on the reasons behind parent’s choice for the sex of their 
 children by considering different preferences for each of them. We try to s
 olve the problematic of sex selective abortion by developing a parsimonious
  model which incorporates different utilities for boys and girls\, the barg
 aining between family members and the decision about abortion dependent on 
 its cost. We calibrate the model using data of the Demographic and Health S
 urvey dataset on Albania for the year 2008 by measuring the preference for 
 children for both sexes by the time invested in the child\, education\, vio
 lence\, and women empowerment by how independent are women in taking decisi
 ons. Furthermore we find that if we increase gender empowerment and equaliz
 e preference in children sex ratio decreases by 0.04. To conclude we propos
 e different policies that can help in the decline of the sex ratio disparit
 y.\\n\\nContact: Kenza Elass: kenza.elass[at]univ-amu.frCamille Hainnaux: c
 amille.hainnaux[at]univ-amu.frDaniela Horta Saenz: daniela.horta-saenz[at]u
 niv-amu.frJade Ponsard: jade.ponsard[at]univ-amu.fr\n\nPlus d'informations:
  https://amse-aixmarseille.fr/en/events/robin-ng-keiti-kondi-0
LOCATION:MEGA
URL;VALUE=URI:https://amse-aixmarseille.fr/en/events/robin-ng-keiti-kondi-0
CONTACT:Kenza Elass: kenza.elass[at]univ-amu.frCamille Hainnaux: camille.ha
 innaux[at]univ-amu.frDaniela Horta Saenz: daniela.horta-saenz[at]univ-amu.f
 rJade Ponsard: jade.ponsard[at]univ-amu.fr
TRANSP:OPAQUE
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