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yetanotherphd

1,156 karma · joined September 9, 2013

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yetanotherphd··on Economics Simulation
Why do you presume to talk down to me when you haven't even bothered to address the points in my post (in particular the concrete examples I gave of rational agents vs simulations). I have a PhD in economics, but I don't insist that people take my word for gospel. You on the other hand, seem to think that reading a single book makes you an expert.
yetanotherphd··on Buses for Tech Workers in San Francisco Will Pay Fee
The purpose is to deal with the issues arising from the physical presence of the buses, and $1 a stop might be enough for that.

The purpose is not to discourage the buses. If a person wishes to live in San Francisco, and work at Google, that is their right (assuming they can pay the rent). No one has any moral basis for trying to stop them from exercising that right, any more than I have a right to stop people from paying high prices for caviar so, that I can afford it.

yetanotherphd··on Yesterday, the Internet Solved a 20-year-old Mystery
I wonder if n-grams could solve this automatically?

If we consider the actual words to be a latent variable, then we can use an n-gram model to compute the maximum likelihood estimate (sorry Bayesians) using dynamic programming.

There is also the Bayesian approach where you treat it as a Bayesian network and use belief propagation to compute the marginal posteriors over each letter.

EDIT: took a while to figure out the ML approach.

yetanotherphd··on Poll: Do you donate to charity?
A trivial amount, like $200 last year.

I give to charities that seem to be cost efficient, like those in givewell.com

yetanotherphd··on Female Founders Conference
I think that women are often put off by the nasty, aggressive vibe in tech. No one wants to go into an industry where they will get sworn at, or have snide remarks made at them. Here are some examples just from this thread:

>you're pretty fucking ignorant and stubborn and just dickish on the whole.

>no need to get your panties in a bunch over this.

>Could you kindly s tfu please?

yetanotherphd··on Female Founders Conference
>Does anyone have ideas about what could be done to educate...

Well the problem with debate is that everyone wants to "educate" the other side. So my idea is that you prove you are actually right, and then maybe people will accept your views.

yetanotherphd··on Economics Simulation
I think that paper doesn't capture the main reason economists shun simulation.

It is true that economists have an unjustified preference for analytic solutions over numeric solutions.

However, the main reason to avoid simulations, is that the assumption of rational agents is not very amenable to the typical approach of simulation. Any simulation that imposed the assumption of rationality would look very different to the simulations that are usually done.

For example, rational agents make decisions based on future prices. I might decide to build a factory, because I expect positive profits given the future prices of inputs and outputs. But I can only know this if I have myself modeled the entire economy. Economists do this using backward induction. They solve for equilibrium in the future, and work backwards.

Another more basic example is that rational agents naturally form markets. Buying/selling of goods is much more accurately described by a perfect market, than by some random matching with random prices.

yetanotherphd··on Economics Simulation
It's also flawed in that most transactions increase the wealth of both parties. Even though wealth in this context includes non-monetary factors, (e.g. I exchange my time for money), it still means that the interactions in the article (two people meet and one ends up with some proportion of the total money) are very unrealistic.

It might be a realistic simulation of professional poker players.

yetanotherphd··on Death threats and denial for woman who showed college athletes struggle to read
You

>However, it is true that women are targeted much more (especially when they are challenging mens sports).

You

>Give a link to said study or go back to /r/theredpill.

Hypocrite.

yetanotherphd··on She's a beauty and a geek: Supermodel is a coder
Cool, so in the meantime I will just assume they are all right :)
yetanotherphd··on She's a beauty and a geek: Supermodel is a coder
>The term 'software engineer' conjures images of pasty-faced young men with poor posture and limited social skills.

I'm really confused. Are we onto third or fourth wave feminism yet? I thought body shaming was bad and the modelling industry was evil.

Aren't we always being appealed to, as nerds, to empathize with groups that are underrepresented in tech, because we too, didn't fit in in high school?

yetanotherphd··on You’re Eight Times More Likely to be Killed by a Police Officer than a Terrorist
If everyone in the world (except say 0.0001% of people) took MMR vaccines, then you would probably be 8 times more likely to die of an MMR vaccine than Measles.

Does that mean everyone should stop taking the vaccine?

yetanotherphd··on She's a beauty and a geek: Supermodel is a coder
You claim that what is happening is that every time a story than happens to involve a Black person or a woman is posted, people post comments about race/gender to derail the discussion.

What is actually happening is that every time a story promoting progressive views on race/gender (this story explicitly mentions gender), people post to disagree with the message of the story.

yetanotherphd··on She's a beauty and a geek: Supermodel is a coder
Yeah, it's hard to see how being looked down on as ugly people with bad social skills is a mark of privilege. I apologize for being such a loser, since its clearly oppressing normal attractive people who want to enter the field.

Perhaps their thinking is that if people who are born with the privilege of being White and male end up as losers, then those people must be objectively inferior and so there is nothing wrong with making fun of them. I have trouble following progressive thinking sometimes.

yetanotherphd··on Show HN: I quit my job to help communities fund energy efficiency upgrades
Wow, I'm impressed. Before you replied, I would have guessed you found a loophole to avoid SEC regulation.

I haven't read enough to judge how beneficial the particular loans you broker are, but I think that just showing that it's possible to crowdsource investment this way is a great achievement.

yetanotherphd··on Show HN: I quit my job to help communities fund energy efficiency upgrades
What kind of legal arrangements are being used here?

Does the person/company who borrows money legally owe this debt to the investors? And which government bodies regulate these transactions?

yetanotherphd··on The effect of today’s technology on tomorrow’s jobs
For people like me who have trouble making it to the end of an article, I want to repeat the solution that the authors propose:

>Yet however well people are taught, their abilities will remain unequal, and in a world which is increasingly polarised economically, many will find their job prospects dimmed and wages squeezed. The best way of helping them is not, as many on the left seem to think, to push up minimum wages. Jacking up the floor too far would accelerate the shift from human workers to computers. Better to top up low wages with public money so that anyone who works has a reasonable income, through a bold expansion of the tax credits that countries such as America and Britain use.

For basic income advocates, I would also like to point out that this policy is much closer to basic income than increasing the minimum wage.

yetanotherphd··on Oxfam: 85 richest people as wealthy as poorest half of the world
There is nothing wrong with squeezing maximum profits out of business, assuming it doesn't create negative externalities. Justification of this practice is found in the fundamental welfare theorems of economics, which state that an algorithm for maximizing total wellbeing is to let the free market work, and only intervene by redistributing income (under a more realistic set of assumptions, the government should also provided many services).

I consider the responsibility of maximizing shareholder value to be a moral one primarily. If people invested their money in a company, it's not for the management to decide that actually they investors don't need that much return on their investment.

yetanotherphd··on The Death Of Expertise
>Cost-push is described in Reisman's tome "Capitalism" and is shown why it is a false theory starting on pg. 907.

I couldn't understand that. One difficulty is that not only do Austrian economists use a different language to describe things, but it seems to be arguing against a traditional Keynesian viewpoint. Right now PhD programs don't teach any traditional Keynsian econ, (undergrad programs teach a bit), they skip straight to neo-Keynsianism, which only keeps a few ideas from the original Keynes (e.g. sticky prices). So I don't really understand what the article is arguing against.

I already gave a description of what I thought the sticky-prices based argument for cost-push inflation was. Can you explain in your own words how this particular argument is refuted?

Re the professor, I guess I'll just chalk that up to a bad professor.

yetanotherphd··on For the Love of Money
I would say that in most cases, people need to redefine importance in a way that is hard to accept. There is no need for scare quotes. The value is real, and when a person earns a certain amount, it's because the produce that much value (finance is kind of exceptional, in that there is a mix of true value and rent-seeking).

Now how can it be that nurse practitioners don't produce that much value? It is because the relevant quantity is the marginal value of an additional nurse practitioner, not the average value. And why is it fair to pay people according to their marginal value, and not their average value? That is because it incentives the most efficient behavior. An additional software engineer is worth more to society than an additional nurse. The fact that getting rid of all nurses would be worse than getting rid of all software engineers (assuming this was true) is irrelevant, because as people quit the nursing profession, wages will rise.

So the problem is not capitalism, but people's inability to accept that the implications of economics theory: first, that there is no ethical reason to reward people for the average value of a person in their profession, as opposed to the marginal value, and second, that frivolous things like Twitter can be as valuable as medical services (if people are willing to pay as much for either).

yetanotherphd··on For the Love of Money
You can be a de facto market maker without any government regulation. Economically, a market maker is someone who moves the bid and ask closer, so that more people are willing to do transactions. They do this by deducing the true price, and they might do this through fundamental or technical analysis.

Providing liquidity in all situations might be useful, but it is an added bonus. If you don't do this, you are still a market maker.

yetanotherphd··on For the Love of Money
I think the author has suffered from a lot of psychological pain stemming from his childhood, and I can sympathize a lot with that. I think he really did have a wealth addiction, like he describes.

However, that doesn't generalize to the entire industry. People (especially men) like money and power because of the benefits they brings. It doesn't have to be an addiction. Furthermore, the idea that it would take an addiction to wealth not to see how immoral the finance industry is, is reliant on having very specific (and wrong, in my opinion) political views.

yetanotherphd··on Renting vs. buying a home
I think you are also suffering from the error of focusing entirely on one aspect of the problem and ignoring the others.

Forced saving, and cost-benefit analysis are both factors that should be taken into account. Your claim that a person is entirely incapable of saving unless they have a mortgage is a bit extreme.

yetanotherphd··on Renting vs. buying a home
I always thought the main difference between buying and renting was tax, since mortgage payments are tax deductible.
yetanotherphd··on Renting vs. buying a home
>he had to go through mortgage default to get a modification on his loan.

When you take this modification into account, his investment might not look so bad.

But I agree with your general point. I was also taught the middle-class fuzzy thinking that paying rent is "throwing money away".

yetanotherphd··on Elites embrace “do what you love” mantra. But it devalues work & hurts workers
It's hard to extract anything useful from an article that assume that wages are set by rhetoric, and not supply and demand.

The reason people in the "lovable-work" camp make more money, is that their skills have lower supply and higher demand. This in turn is because these jobs tend to require more intellectual and creative skills.

yetanotherphd··on The Death Of Expertise
You claim that only the sex of the other person involved is relevant, and not whether the intercourse is with someone of the same or opposite sex.

This is wrong, and shows precisely the lack of understanding of conditional probability that I described. I am especially shocked by your use of lesbian intercourse as an example, since everyone knows the issue is men-who-have-sex-with-men. Lesbians are completely irrelevant to this debate.

Let us compare the probability of a man getting AIDS from having sex with a random man, vs a random woman. As you say, these are probably similar. However, it might be very hard for a man to convince another random man to have sex with him! So what we really want to calculate is the probability of getting AIDS from a random, actually occurring, sexual encounter (not with a prostitute) between a man and a woman, and a man and another man. This is what the statistic is intended to mean, and how people will interpret it, even if it is not always properly qualified. In this case, the probability of the man who has sex with a man getting AIDS is much higher, because gay men have a much higher incidence of AIDS than heterosexual women.

So we could add the following useless disclaimer to my earlier claim: if you are a man, sex with a randomly chosen man (including straight men) is not especially dangerous. It's only when you condition on that man being gay that it becomes statistically more dangerous.

Of course, this disclaimer would still be wrong since the sex with the man would probably be anal, which is inherently more likely to spread AIDS.

>What's more, the qualifier that it has to be with a white woman is important. That's why I included it :)

I can't comment on why AIDS is higher for heterosexuals in Africa than the US. I don't necessarily accept your claims about it. But that is not the issue here. I am talking about the probability of getting AIDS given the current situation, not any inherent link between being gay and AIDS. The actual cause is not relevant.

The best that you could say, is that the reason for these misleading statistics is not to promote gay rights, but to scare people into taking precautions that are good for society as a whole.

yetanotherphd··on The Death Of Expertise
I hadn't heard of cost-push inflation before, and I didn't specialize in macro-economics. Who discredited this theory? The Wikipedia article says that according to Keynsians (and most modern economists are neo-Keynsians who beleive in sticky prices), prices are sticky downwards and so a supply shock to a single good would cause inflation. This seems to be an issue that could be resolved empirically. Are you familiar with the empirical evidence?

On your second point, perhaps your professor meant that he believed in free enterprise, but wanted to use the taxation system to make post-tax income much more equal? If so, there is no contradiction.

yetanotherphd··on Rich Chinese continue to flee China
>Assume you can't take the government's word on what is corruption.

That is a big assumption. The Chinese government is very flawed, but you are wrong in assuming that they would define corruption in a completely arbitrary manner. They would most likely (as they have done already) make an example of the worst, most clear cut, cases.

yetanotherphd··on Cities and Ambition (2008)
Based on this article http://www.stanforddaily.com/2010/08/12/diversity-remains-on... around 28% (60% of the 46% of students receiving financial aid) of undergraduate students at Stanford come from families with comes of $100,000 or less.
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