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Comment Re:Headline misleading (Score 1) 437

to simply go after cheaters is putting a band-aid over the real problem.

I disagree. Some portion of students will cheat as long as (in theory):

[benefit of higher grade] - [cost of honestly achieving higher grade] > {[benefit of cheating] - [cost of cheating]} * [ risk of getting caught cheating] * [value of punishment for cheating].

The real problem is that people are lazy and want to get the best return for the smallest investment. This cannot be fixed, it is human nature.

So we tip the equation in favor of not cheating, by either/and

1. Making the punishment so extreme (expulsion) that even if the risk of getting caught is low, cheating is not a good idea. The problem with this approach is that as the risks of getting caught decrease, people dismiss the risk as zero. This is a known problem with how humans interpret probability and risk dealing with VLNs and VSNs.
2. Increasing the chance of being caught. This is a problem because of the costs involved, as well as an "arms race" between proctors and students.

Note that the equation is also affected by the fact that cheating has become easier, and thus cheaper. There is also a factor for personal inhibitions against cheating, but I'm not sure how to fit it into the model.

PS. sorry for the messy formula.

Actually the model would be:

Cheating and not getting caught = CNGC
Cheating and getting caught = CGC

Expected[Utility CNGC] = (1- Probability[CGC])*[Utility CNGC] > Expected[Utility CGC] = [Probability CGC]*[Utility CGC]

where [Utility CNCG] = f([how much work was done]; [utility of higher grades]; [Utility of the act of cheating independently of its outcome])

Your model describes the decision of "planning to cheat", not cheating itself.

Comment Re:no thanks (Score 1) 454

2) giving a cut to some payment processor like PayPal? I'd rather use cash.

Cash is much more expensive than electronic money.

An example of this is the 50 euro bill here in Europe. In most ATMs, 50 euros is the biggest bill available. This means that the 50 euro bill is almost never used to give change back. Now think about the life cycle of a 50 euro bill.

First, it is printed, checked etc and sent guarded by big men with guns to banks, where they are put inside an ATM machine.
Then, a consumer takes it out a 50 euro bill in the ATM. He then goes to a shop and buys product A, gives the 50 euro bill, and receives change (which is of course smaller than 50 euros).
The 50 euro bill then stays in the cash register where it is accumulated with other 50 euro bills since no one pays with a bill higher than 50 euros, it can never be used as change.
After a long day of work, the shopkeeper then bring the bill back to the bank, where it is counted, bagged and sent back to the national bank guarded by big men with guns.
The national bank then checks that the bill is in good condition, bags it ans sent it back guarded by big men with guns to the bank where it is put in the ATM for the next consumer.

This whole process is hugely expensive.

So you may have the impression that you don't give a cut when using cash, but that's merely because the cost is subsidized elsewhere.

Comment Re:Corps sometimes help more than gov't (Score 1) 658

Not true. Wal-Mart and Home Depot did a better job than the gov't during Katrina. [..]

The real pioneers and leaders in Logistics are the Army... for the same reasons that Wall-Mart is better in logistics than FEMA was (is?). Incentives and experience. The hurricane Katrina was a once-in-a-career experience, where the Army and Wall-Mart are busy day-in day-out with logistics, of course Wall-Mart will be better.

This has absolutely nothing to do with being governmental or not.

Comment Re:Statistical analysis of the summary (Score 1) 572

Let's see, we have one guy complaining about how none of his programmer coworkers understand statistics, and we have X coworkers who undoubtedly disagree with him. Since we do not know him or any of his colleagues to any meaningful degree, we have to assign equal weight to each of their opinions. Statistics then tells us there is a 1/(X+1) chance of his being right, and an X/(X+1) chance of their being right. We can assume that X >= 2 based on his ranting, therefore resulting in the odds favoring them by at least 2/3, and probably much more. Therefore it is only rational to assume they are correct.

Euh no... The Variable (Zed being right or not) is not stochastic. The "probability" of him being right is either 1 or 0.

Games

Whatever Happened To Second Life? 209

Barence writes "It's desolate, dirty, and sex is outcast to a separate island. In this article, PC Pro's Barry Collins returns to Second Life to find out what went wrong, and why it's raking in more cash than ever before. It's a follow-up to a feature written three years ago, in which Collins spent a week living inside Second Life to see what the huge fuss at the time was all about. The difference three years can make is eye-opening."

Comment Re:China debuts human rights abuses (Score 1) 491

There are plenty studies showing strong correlation between economic freedom and GDP (even between US states)

That "study" is BS. Just look at the errors, the higher the variables, the higher the variance between the model and the actual data. You can't confidently draw correlation conclusions with heteroskedasticity. The only thing this "study" shows is that the authors lack a good understanding of econometrics.

Space

Super-Earths Discovered Orbiting Nearby, Sun-Like Star 242

likuidkewl writes "Two super-earths, 5 and 7.5 times the size of our home, were found to be orbiting 61 Virginis a mere 28 light years away. 'These detections indicate that low-mass planets are quite common around nearby stars. The discovery of potentially habitable nearby worlds may be just a few years away,' said Steven Vogt, a professor of astronomy and astrophysics at UCSC. Among hundreds of our nearest stellar neighbors, 61 Vir stands out as being the most nearly similar to the Sun in terms of age, mass, and other essential properties."

Comment Re:Adapt or else (Score 1) 324

Comcast has a Debt/Equity ratio of 67... so in theory 67% of their value is not theirs to spend, as creditors are going to want their money back. Now looking at Google's Debt/Equity ratio.... huh. It looks like Google doesn't owe anyone any money.

Notwithstanding that you're probably talking about the Debt/Total Assets ratio (a Debt/Equity ration of 67 would mean that 98.5% (or 67/68) of their financing comes from debt), you cannot compare two companies operating in different sectors by looking at such ratios. Having a higher financial leverage doesn't mean a company is good or badly run, it depends of many factors such as the industry they're in, the nature of their assets, the stability of their income streams etc...

Not owing anyone any money can also be a sign of a badly run company, as it could go against the principle of maximizing shareholder wealth (debt funding is cheaper).

Basically, what grandparent says stands... You're basically comparing apples and oranges.

Comment Re:I am shocked! (Score 1) 670

On an issue as important as whether to expend tax money to keep incompetent management in place in failed banks, it's pretty damned sad that Obama and McCain weren't on opposite sides of the question.

-jcr

You're sad that none of the Presidential candidates wanted to play Russian roulette with the American/World economy?

You know, maybe you should learn a little about capital markets before making ideological judgments on issues.

Comment Re:% VS Times (Score 1) 295

Well, it runs at 5.7X the original speed right?

So 5.7X CD-Rom drive runs at 570% the speed of the original drive.
  Where is my math wrong?

Indeed, 50% of the original performance means that performance was multiplied by 5.7. But it's a 470% increase....

In your original post you spoke of a 570% increase, which would give a multiplier of 6.7.

To make it a bit clearer, in your first post, had you used a 5% increase... you would have DIVIDED performance by 20 using your method!

Get it?

Image

Microsoft Exec Says, "You'll Miss Vista" 273

Oracle Goddess writes "'Years from now, when you've moved on to Windows 7, you'll look back at Windows Vista fondly. You'll remember its fabulous attributes, not its flaws.' That's the opinion of Steve Guggenheimer, vice president of the OEM division at Microsoft. 'I think people will look back on Vista after the Windows 7 release and realize that there were actually a bunch of good things there,' Guggenheimer said in a recent interview. 'So it'll actually be interesting to see in two years what the perception is of Vista.' A dissenting opinion comes from Bob Nitrio, president of system builder Ranvest Associates, doesn't believe organizations that skipped Vista will ever regret their decision. 'I don't think for a second that people are suddenly going to love Windows 7 so much that they will experience deep pangs of regret for not having adopted Vista,' said Nitrio. If I had to bet, I'd go with Bob's take on it." My first thought was, Steve meant Windows 7 is designed to be virtually unusable as payback for all the complaints about Vista, but I might be biased.

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