Limitation of using Black’s shortcut to portfolio optimization in Excel and solution
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If Facebook offers more privacy options, it makes people feel safer sharing their information, and they would likely share more. Example: I want to share information A to group X but not group Y; I am comfortable with (or even have incentive to) revealing interest B to group T but not group U.
Facebook can then perform data mining on the information, it’s inside Facebook’s great wall anyway.
Privacy can hinder those who want to collect data on Facebook only through information visible to them. But not to those who are willing to pay Facebook for the data mining.
Facebook benefits both way.
Photo courtesy: History of Economics Playground
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| Issue | Brief description | Severity | Why this is severe |
| Bugs | Some privacy options don’t work as they’re supposed to | High | Just when you are so certain you have setup the proper privacy protection, your profile and activities burst and your private information is exposed. |
| Version control | When Facebook upgrades functions or migrates data, certain functions are temporarily reverted back to the old version. One that occurred to my account was Live Feed Options. | Low | You thought you have moved on with newer and more interesting things, but suddenly something reverts back to what it was. |
| Default settings | New information or information in sections that are changed by Facebook are, by default, visible to “Everyone”.e.g. Likes and Interests May 2010 | Medium | It takes users a while to figure out how to set privacy for these sections. |
| Lack of settings | Certain settings are not provided.
e.g. Pages I am a fan of Update: this is no longer public on my profile |
Medium | You can’t put control on the items you want. |
| Changing settings | When Facebook upgrade certain features, privacy options related to that feature are sometimes lost.
e.g. Option to set for newsfeed not to display comment one writes on his/her friend’s content. I used to set it, and couldn’t find it again. |
Medium | I am confused. |
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Nassim Taleb and his classic metaphor of a turkey
My extension attempt from it:
A sheep is fed and combed for a 1000 days, every day confirms to his statistical department that the human race cares about his welfare and fur on his body. On the 1001st day, the sheep is shaved.

At least, the sheep is alive. He has hints to determine when they will want lamb meat (e.g. Easter).
Does he?
How does one get to being a sheep from the state of a turkey?
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Nur Shairah Ishak, Tai Tran, Huy Truong
2009

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