Limitation of using Black’s shortcut to portfolio optimization in Excel and solution

By Tai, May 17, 2010 10:23 pm

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More on Facebook privacy and data collecting

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Information flow

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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Facebook current privacy issue made clear

By Tai, May 15, 2010 5:44 pm

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Facebook privacy

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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If being a turkey scares you to death

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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.

sheep

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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Evaluating ERP implementation and usage at Harley-Davidson

By Tai, May 12, 2010 10:21 pm

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Evaluating ERP implementation and usage at Harley-Davidson

Nur Shairah Ishak, Tai Tran, Huy Truong

2009

ERP implementation Harley-Davidson

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