<div dir="ltr"><div class="gmail_default" style="font-size:small"><div class="gmail_default"><font face="arial, sans-serif"><font style="color:rgb(0,0,0);vertical-align:inherit"><font style="vertical-align:inherit"><b>When:</b>    </font></font><font style="vertical-align:inherit"><font style="vertical-align:inherit"><font style="color:rgb(0,0,0)">    Friday, March 31</font><span class="gmail_default" style="color:rgb(0,0,0)">, 2023</span><font style="color:rgb(0,0,0)"> at</font><b style="color:rgb(0,0,0)"> <span style="background-color:rgb(255,255,0)"><u>2:30 pm</u></span></b><b style="background-color:rgb(255,255,0)"><u style=""><font color="#000000"> CT</font></u><font color="#000000" style="">   </font></b></font></font><br></font></div><div class="gmail_default"><p style="color:rgb(80,0,80);font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;margin:0px"><b style="font-family:arial,sans-serif"><font color="#500050"><br></font></b></p><p style="color:rgb(80,0,80);font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;line-height:normal;margin:0px"><b style="font-family:arial,sans-serif"><font color="#500050">Where:       </font></b><font color="#000000" style="font-family:arial,sans-serif"><span class="gmail-il">Talk</span> will be given </font><font color="#000000" style="font-family:arial,sans-serif;font-weight:bold"><u>live, in-person</u></font><font style="font-family:arial,sans-serif;font-weight:bold"> </font><span style="font-family:arial,sans-serif">at</span><br></p><p class="MsoNormal" style="margin:0in;color:rgb(80,0,80);line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, sans-serif"><font color="#500050">               </font><font color="#000000">    TTIC, 6045 S. Kenwood Avenue</font></font></p><p class="MsoNormal" style="margin:0in;color:rgb(80,0,80);line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, sans-serif" color="#000000">                   5th Floor, Room 530<b> </b></font></p><p class="MsoNormal" style="margin:0in;color:rgb(80,0,80);line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, sans-serif"><b><span style="color:black"><br></span></b></font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;color:rgb(80,0,80);line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, sans-serif"><b style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap">Virtually:</b><span style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap">   <i>via</i> Panopto </span>(<b><a href="https://uchicago.hosted.panopto.com/Panopto/Pages/Viewer.aspx?id=5aa81108-ea99-4e34-806a-afd00002109e" target="_blank">livestream</a></b><span style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap">)</span><br></font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;color:rgb(80,0,80);line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font face="arial, sans-serif"><span style="color:rgb(60,64,67);letter-spacing:0.2px;white-space:pre-wrap"><br></span></font></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;color:rgb(80,0,80);line-height:normal;background-image:initial;background-position:initial;background-size:initial;background-repeat:initial;background-origin:initial;background-clip:initial"><font style="font-family:arial,sans-serif;vertical-align:inherit"><font style="vertical-align:inherit"><b>Who:          </b></font></font><span style="color:rgb(34,34,34)">Juba Ziani, Georgia Institute of Technology</span><span style="font-family:arial,sans-serif"> </span><font color="#500050" style="font-family:arial,sans-serif">    </font><font color="#000000" style="font-family:arial,sans-serif"><font color="#500050">   </font></font></p><div class="MsoNormal" align="center" style="margin:0in 0in 8pt;color:rgb(80,0,80);text-align:center;line-height:15.6933px"><hr size="2" width="100%" align="center"></div><div><span style="background-color:rgb(255,255,255)"><b style="color:rgb(60,64,67);font-family:Roboto,Helvetica,Arial,sans-serif;font-size:14px">Title:</b><span style="color:rgb(60,64,67);font-family:Roboto,Helvetica,Arial,sans-serif;font-size:14px">          Information Discrepancy in Strategic Learning</span></span></div><div><span style="background-color:rgb(255,255,255)"><br style="color:rgb(60,64,67);font-family:Roboto,Helvetica,Arial,sans-serif;font-size:14px"><b style="color:rgb(60,64,67);font-family:Roboto,Helvetica,Arial,sans-serif;font-size:14px">Abstract:</b><span style="color:rgb(60,64,67);font-family:Roboto,Helvetica,Arial,sans-serif;font-size:14px"> We study the effects of non-transparency in decision rules on individuals' ability to improve in strategic learning settings. Inspired by real-life settings, such as loan approvals and college admissions, we remove the assumption typically made in the strategic learning literature, that the decision rule is fully known to individuals, and focus instead on settings where it is inaccessible. In their lack of knowledge, individuals try to infer this rule by learning from their peers (e.g., friends and acquaintances who previously applied for a loan), naturally forming groups in the population, each with possibly different type and level of information regarding the decision rule. We show that, in equilibrium, the principal's decision rule optimizing welfare across sub-populations may cause a strong negative externality: the true quality of some of the groups can actually deteriorate. On the positive side, we show that, in many natural cases, optimal improvement can be guaranteed simultaneously for all sub-populations. We further introduce a measure we term information overlap proxy, and demonstrate its usefulness in characterizing the disparity in improvements across sub-populations. Finally, we identify a natural condition under which improvement can be guaranteed for all sub-populations while maintaining high predictive accuracy. We complement our theoretical analysis with experiments on real-world datasets.</span><br style="color:rgb(60,64,67);font-family:Roboto,Helvetica,Arial,sans-serif;font-size:14px"><br style="color:rgb(60,64,67);font-family:Roboto,Helvetica,Arial,sans-serif;font-size:14px"><b style="color:rgb(60,64,67);font-family:Roboto,Helvetica,Arial,sans-serif;font-size:14px">Bio: </b><span style="color:rgb(60,64,67);font-family:Roboto,Helvetica,Arial,sans-serif;font-size:14px">Juba Ziani is an Assistant Professor in the H. Milton Stewart School of Industrial and Systems Engineering. Prior to this, Juba was a Warren Center Postdoctoral Fellow at the University of Pennsylvania, hosted by Sampath Kannan, Michael Kearns, Aaron Roth, and Rakesh Vohra. Juba completed his PhD at Caltech in the Computing and Mathematical Sciences department, where he was advised by Katrina Ligett and Adam Wierman. Juba studies the optimization, game theoretic, economic, ethical, and societal challenges that arise from transactions and interactions involving data. In particular, his research focuses on the design of markets for data, on data privacy with a focus on "differential privacy", on fairness in machine learning and decision-making, and on strategic considerations in machine learning.</span></span><br></div><div><div><div><font color="#000000" face="arial, sans-serif"><b><br></b></font></div><div><b style="color:rgb(0,0,0);font-family:arial,sans-serif">Host: </b><a href="mailto:vakilian@ttic.edu" target="_blank" style="font-family:arial,sans-serif">Ali Vakilian</a><br></div></div></div><div><font face="arial, sans-serif"><br></font></div><div><br></div><div><br></div><div><br></div></div></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><span style="font-family:arial,helvetica,sans-serif;font-size:x-small">Mary C. Marre</span><br></div><div><div><font face="arial, helvetica, sans-serif" size="1">Faculty Administrative Support</font></div><div><i><font face="arial, helvetica, sans-serif" color="#3d85c6" size="1"><b>Toyota Technological Institute</b></font></i></div><div><i><font face="arial, helvetica, sans-serif" color="#3d85c6" size="1">6045 S. Kenwood Avenue, Rm 517</font></i></div><div><font size="1"><i><font face="arial, helvetica, sans-serif" color="#3d85c6">Chicago, IL  60637</font></i><br></font></div><div><font size="1"><i><font face="arial, helvetica, sans-serif" color="#3d85c6">773-834-1757</font></i></font></div><div><b><i><a href="mailto:mmarre@ttic.edu" target="_blank"><font face="arial, helvetica, sans-serif" size="1">mmarre@ttic.edu</font></a></i></b></div></div></div></div></div></div>