<div dir="ltr"><div><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>Dear all,</div><div><br></div><div>We have got an external guest Iraklis from Belgium attended our last game theory reading group session (online). He got some challenging questions for us (please see the forwarded message). If you get time, could you please kindly check his questions and offer some quick feedback if you can. Many thanks!</div><div><br></div><div>Best,</div><div>Dengji </div></div></div></div></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">iraklis</b> <span dir="ltr"><<a href="mailto:iraklis.symeonidis@esat.kuleuven.be">iraklis.symeonidis@esat.kuleuven.be</a>></span><br>Date: 27 March 2015 at 14:01<br>Subject: Game theory question<br>To: "Zhao D." <<a href="mailto:d.zhao@soton.ac.uk">d.zhao@soton.ac.uk</a>><br><br><br>Dear Dr Dengji Zhao,<br>
<br>
I am Iraklis Symeonidis and yesterday I attended the Game Theory<br>
session. First, I would like to thank you for your time and also for<br>
giving me the opportunity to cycle some research questions.<br>
<br>
In financial crypto of 2013 there is a paper with respect to<br>
Applications (app) of Facebook and the privacy implications of two users<br>
installing a privacy invasive app. For this analysis they used a game<br>
theory approach. Although I understood the paper I have some questions<br>
about the approach. In synopsis my questions are:<br>
<br>
1) How can we understand if this approach that they propose is the<br>
correct one ? (describes the world correctly) Rephrasing, if there are<br>
two game theory simulations analyzing the same case, how can we be sure<br>
the approach they used is the correct one ?<br>
<br>
2) They use a formula to estimate the payoff values. They propose an<br>
additive formula of positive externalities (other user ratings),<br>
negative externalities (privacy invasive permissions) and the user<br>
valuation (a rating). Is it possible to combine these different type of<br>
parameters in one formula ? Is more mathematical question but I don't<br>
know how lax can a payoff formula be.<br>
<br>
3) If we have variant negative externalities such as invasive<br>
permissions, web tracking issues and more. Is there any way to combine<br>
these values in one formula, if you either set the parameter values<br>
manually ? For instance, if there are 3 privacy invasive permissions<br>
been held by an app but also is leaking 1 user attribute via web<br>
trackers, do these values can be combined ?<br>
<br>
<br>
<br>
Thank you for your time !<br>
<br>
Best regards,<br>
Iraklis Symeonidis<br>
</div><br></div>