Don't interact with strangers' children.

The way current law is set up, being a Good Samaritan and trying to rescue someone else's kid can only get you in trouble.

Browsing the Internet, I've found a few anecdotes which support this view. I don't have any verification that they're true, so you'll just have to take my (and their) word for it.

First story: a young woman is waiting at a street corner. She sees a mother, who is not paying attention, whose child wanders out into the street in front of an oncoming bus. The young woman jumps out and pulls the child back onto the sidewalk. Her reward? The mother yelling "how dare you touch my kid!!" and our would-be hero is treated as a villain, and forced to flee the scene.

Second story: a young man is on the beach. He observes a small male child falling off his surf board a long distance from land. The young man swims out and rescues the child from drowning. On returning to shore, he's greeted by an irate mother who calls the police and wants to press charges for child molestation. Luckily, witnesses confirm the man's story and the cops let him go.

Following this second anecdote a (self-proclaimed) lawyer comments, describing how this situation could have led directly to the young man being registered as a sex offender. By the time police would have questioned the child, his head would be full of misinformation from the angry mom, causing him to tell the police what they "want to hear", possibly putting the Samaritan behind bars or at least requiring a costly and life-disruptive legal defense.

Now, I'm not blaming either the moms in this situation (they are probably freaked out and will naturally accuse the first person they see who might be responsible for their child's endangerment) or the harsh treatment of sex offenders (children should obviously be protected from predators). But it's worth noting the incentive effects that these sort of stories have on potential Good Samaritans.

My personal stance is to never interact with a stranger's child no matter what the circumstances are. I won't engage in conversation, nod, smile, or hold a door open. I was about to say that the most proactive thing I'd do if I saw a child in danger would be to record the incident on video to give to YouTube the authorities later, but even taking pictures of kids can get a guy in trouble... So I probably wouldn't even do that.

Being a Good Samaritan is really a lose-lose proposition. If I succeeded in saving the child, best-case scenario I get a pat on the back, worst-case is a sex-crimes trial that will haunt me for the rest of my life. If I fail to save the child (it still falls under the bus) then maybe I get accused of murder or assault because the angry parent saw me "push" the kid instead of trying to rescue it!

There is absolutely no upside to helping or interacting with a stranger's kid. Perversely, this fact makes being a Good Samaritan far worse: because rational people know it's a bad idea to help a kid, the people who do try to help are even more likely to be creeps or labeled as such (the selection effect).

In its efforts to prevent strangers from harming vulnerable children, society has also unintentionally deterred strangers from assisting vulnerable children. It's hard to say which impact is more important, but given the relative magnitudes (there are lots more healthy, well-intentioned people out there than sex offenders) it's very possible the overall effect has been negative for child safety.

New Blog Section

I added another section to the blog, titled "Other Writings." It contains links to my (currently sparse) published works, as well as other papers I've written over the last two years that haven't been published yet. Comments welcome.

First Textbook in Social Media Marketing

Blatant self-promotion, but I can't resist.

(c) Cengage Learning 2013.

The book that I helped write is now in print. Find it here. Many thanks to my co-authors as well as the professionals at Cengage Learning for making this possible.

While intended to accompany a college- or graduate-level marketing course, I think this text does a pretty good job of encapsulating the advice that can be found in other prominent trade books, in addition to presenting some original and innovative material (I'm especially proud of Chapter 3). As far as I know, it's the most thorough treatment of social media marketing that can be found in one place. A boon to students and aspiring professionals alike. A magnum opus indeed.

Hyperbole aside, I'm very pleased with how the book turned out. I hope that some other people are able to derive utility from it as well.

Liberal Arts Degrees as Social Signaling

The model of education as signaling for the labor marketing has been thoroughly developed by Bryan Caplan; for some examples, see here, here, and here. I think the argument is pretty convincing, but it leaves a few details unexplained. Namely, some majors - especially liberal arts - are not even very good as signals!

The highest unemployment rates for college graduates are found among architecture, art, and humanities majors. Especially given the relatively low salaries for jobs in these "industries" why go into serious debt to get a degree, when the signal is likely to be weak or even totally ineffective? While the number of liberal arts colleges has been declining over the last 20 years and business is the most popular major for under-graduates (chosen by 20% of students) the liberal arts curriculum is far from disappearing.

It could be that these students are maximizing with regard to something other than wealth, such as social status. This may accrue to either the college student or that student's parents, who get to brag about how their son/daughter will be a progressive hero and "save the world one day." Parents have incomplete control over what major their child picks, but at least some power to encourage or discourage certain fields of study.

Thinking of education as a status symbol helps to explain variation in choice of majors across countries. In the United States, the poor and middle-class can get luxury items like fancy cars, jewelry, nice TVs, smartphones etc. by using credit (Robert Kiyosaki's "Rich Dad Poor Dad" observes that this is a big reason why they do not ascend to the capitalist upper-class). Seeing someone with nice jewelry or the latest tech is no longer a good indicator of high status in America; in fact, it is often a signal of the opposite! A liberal arts degree then becomes a new status symbol, a way of displaying "yes I can spend four years doing nothing productive, and rack up debts while doing it, because money isn't important to me."

In China, by comparison, most of the affluent or middle-class people have attained that status within the last one or two generations. The rich in China display their wealth through luxury items, but parents still often discourage or frown upon liberal arts degrees (or so I'm told by someone with personal experience). Based on the social signaling theory sketched out above, one would expect that as the middle-class in China grows and expensive items are no longer limited to the nouveau riche, more will go get liberal arts degrees, instead of the focus on STEM (science, technology, engineering, and math) which is the stereotypical image of Chinese students currently.

If this model is accurate, it just further reinforces Dr. Caplan's point that we should not be subsidizing higher education as much as we are now.

Fuzzy Economics and Legal Fees

The New York Times has published several articles in the last two months targeting the American Bar Association. In October, Clifford Winston questioned the need for bar exams and professional licensing. Last week, David Segal wrote "For Law Schools, a Price to Play the A.B.A.’s Way" which blames the ABA's control over law school accreditation for overly high legal fees.In that article, he writes

...The lack of affordable law school options, scholars say, helps explain why so many Americans don’t hire lawyers.

“People like to say there are too many lawyers,” says Prof. Andrew Morriss of the University of Alabama School of Law. “There are too many lawyers who charge $300 an hour. There aren’t too many lawyers who will handle a divorce at a reasonable rate, or handle a bankruptcy at a reasonable rate. But there is no way to be that lawyer and service $150,000 worth of debt.”

This helps explain a paradox: the United States churns out roughly 45,000 lawyers a year, but survey after survey finds enormous unmet need for legal services, particularly in low- and middle-income communities...

This reasoning doesn't make sense to me. It may be true that lawyers are driven to make more money in order to pay off student loans. But, high fees are not the only way to make lots of cash; there is also the low-cost, high-volume strategy (think Walmart). If so much unmet demand for legal services exists, it could be more profitable to charge a lower hourly rate and just work faster or put a little less effort into each case. This wouldn't be practical if the supply of lawyers is artificially restricted, but given the 45,000 new lawyers every year as well as reportedly high numbers of unemployed or idle lawyers, a shortage seems to be unlikely.

Even if the ABA does drive up the cost of law school tuition, that alone can't explain why legal fees are so high. I'd hypothesize that clients pay lawyers a premium wage in order to ensure a high level of effort. As it is hard to monitor an attorney's effort directly, better wages are used as an incentive to keep on the job instead of slacking. In the economics literature, this is referred to as an efficiency wage; the concept has been used to explain why wages remain rigid during periods of high unemployment. That seems to apply quite easily to the legal industry.

I'm sympathetic to the argument for lowering entry barriers to practicing law, but there are other factors at work too which cause lawyer wages to be high. Otherwise, competition in the legal industry would have already driven down prices and serviced the unmet needs in low- and middle-income communities.

Statistical Fallacy #176: Ignoring Selection Effects

I stumbled on a post at a credit-related blog. It starts off with the bombastic first line

"The average consumer is saddled with $29,985 in student loan debt..."

 Wow! That's a lot of debt! It's true that the U.S. population has a giant amount of student loan debt -- even more so than the amount of credit card debt. Last year, I wrote about the subject. But, the figure above is pretty high. That statistic is drawn from "262,887 CreditKarma.com user scores." Sounds pretty robust. But, some simple math reveals there's more to the story.

Facts:

• Total student loan debt in the U.S. is about $1 trillion (~$1,000,000,000,000).
• The U.S. population is 308,745,538. Of that, 24% are under 18, leaving 234,646,609 adult consumers.

Do some division, and you'll find that the average adult consumer has $4261.73 in credit card debt. That's about $25,000 less than the Credit Karma estimate!

What went wrong? My guess: selection effects. Members of a site specializing in credit advice are not a random sample of the population. People who join are probably concerned about their credit... and people who are concerned about their credit probably have a lot of debt.

Nothing personal against the writers for that site, as it would be an easy mistake to make (and they were very nice, even in response to my snarky comment pointing this out). But still, they should have been more careful. A quick test, by multiplying their estimate of average debt by the number of consumers, finds that the U.S. has a total of $7,035,878,570,865 in student loans outstanding, about seven times the real figure. If it were true, that would be about 11% of the entire world GDP owed by American students!

The lesson: look out for non-random sampling due to self-selection, or your numbers will be nonsense.

How to judge campus safety?

A few days ago I was emailed a pdf document: the 2011 Annual Security Report for George Mason University. As mandated by the Jeanne Clery Disclosure of Campus Security Policy and Campus Crime Statistics Act (yeah I hadn't heard of it before either) it provides a breakdown of all criminal activity which occurred on campus, by year, and with special columns for "Hate Crimes." The picture I attached has the numbers for Fairfax. This is the most interesting part of the document to me because it contains some raw figures on different offenses committed in the campus I attend. Statistics for the other George Mason campuses (Arlington, Prince William, Loudoun, etc.) are also available but are a lot less edifying, because the columns have just a bunch of zeroes. Coincidentally, Fairfax also happens to be the only campus with attached undergraduate housing -- make of it what you will.

The most exciting table I've seen since breakfast.

This report is obviously intended to increase public awareness about crime rates on campus, allowing potential students and their parents to make an informed decision when comparing different universities. What I wonder is, how does someone look at this report and get any sense of the probability that they themselves will be victimized? This blog post is a rough attempt at answering that question.

Some useful figures to get started with:

• Roughly 30,000 students attend GMU, 7,000 of them on living on campus.
• From the BJS, around 35% of property crimes and 45% of violent crimes are reported to the police.

Royal Weddings Aren't News.

Heck, royalty in general isn't news. What does the English monarchy even do these days, except splatter their events and "personalities" across global news media at any opportunity?

Here's five things in the news today that I care about more than William and Kate's media circus.

1. India, Mauritius agree on Joint Working Group on Double Taxation
2. In Shift, Egypt Warms to Iran and Hamas, Israel’s Foes
3. Attorneys General Battle NLRB Over Boeing Plant
4. Space Jam: Thousands Flock to See Shuttle Fly, creating potential traffic problems on East Coast
5. Benjamin Moore's "Odorless" Paint Stinks and is Sticky, Suit Charges

Yes, the failure of paint to dry as promised is probably of greater significance than the royal nuptials.... and yet here are the top four items today from Time Magazine.

1. William and Kate: Scenes from a Dazzling Royal Wedding
2. Kate's Grace Kelly Moment
3. Kate Middleton's Sensational Wedding Dress
4. Royal Wedding: The Day's Schedule

The U.S. debt ceiling will be reached in two weeks, the American military is engaged in three different countries, and all we can hear about is royal frippery. If I cared any less, I'd be in a coma. 

Inefficiency of health, education sectors is more than coincidence or the "Baumol effect."

From The Economist, March 17:

Larry Summers, Mr. Obama's main economic adviser till the end of 2010, argues that the goods governments buy, especially health care and education, have proved much more resistant to productivity enhancements than the rest of the economy. Since the 1970s real wages in America have risen tenfold if you measure them against the cost of televisions; set against the cost of health care, they have gone down.
Mr. Summers expects that trend to continue. An ageing population will need ever more health services provided by the state...

Unintentionally, Mr. Summers has presented some truly fabulous arguments against the increase in government spending he seems to advocate.

Is it truly just random chance or amazing foresight which has led the state to invest in sectors which just happen to be resistant to productivity enhancements? The Economist article points to the so-called Baumol effect, whereby some activities are immune to improvements in labor productivity. For example, it still takes the same number of musicians to perform a Beethoven symphony as it did in the 1800s.

To me, this seems like a completely inadequate explanation for the growing costs of education and health care. Unlike symphonies, there have been many technological improvements which should make the provision of those services much cheaper. Increased access to computers has revolutionized other industries and this would seem to be especially true in health or education, where the rapid and accurate transfer of information matters especially. But that hasn't happened.

There is a much simpler explanation: more government intervention causes higher costs. As health and education became increasingly regulated, the incentive to increase productivity became smaller. Teachers and doctors have to satisfy the demands of politicians and not just the parents or patients. There's no reason to rein in costs because taxpayers will foot the bill regardless.

I'd speculate that if the government had decided to regulate and oversee the production of symphony music, it would take twice as many people as it did to perform in the 19th century (and they'd miss twice as many notes). Instead, we have a medical industry that kills 98,000 people per year with preventable accidents, and an educational system that spends the most in the world but can't keep us in the top ten for global rankings of student proficiency in basic math and sciences.

Is this really a success story for government social spending? To me, it sounds like a reason to chop down the vines of red tape choking the market for education and health care. If costs continue to rise after the government's influence has ended, there may actually be an argument for the Baumol effect. Until then it's just empty apologetics.

Self-Educate on Economics – Seven Books to Read.

Selected based on three criteria: content (the book does a thorough and exhaustive review of the material) relevance (the book speaks to issues which matter in terms of current world events) and readability (writing style is accessible and engaging). With that said, here are seven good books for an economic self-education.

1. Exchange & Production: Competition, Coordination & Control. (1983) by Armen Alchian & William R. Allen.

Any student of economics has to start with solid principles textbook. While many different books could suffice, this Alchian & Allen book is readable, comprehensive, and avoids unnecessary complexity while providing excellent coverage. In spite of being several decades old and out-of-print, copies of this book are still available from various online retailers.

2. The Wealth and Poverty of Nations: Why Some are So Rich and Some So Poor (1999) by David S. Landes.

Landes’ book covers a broad spectrum of history, and has the benefit of being an easy read. The general thesis: richer countries tend to be those that embraced trade, private property rights, and intellectual inquiry (these three, historically, tend to occur together). Europe gained a developmental advantage because, by accident or historical circumstance, the conditions for innovation which made the Industrial Revolution possible happened to thrive there. Lest this seem overly Anglo-centric, Landes also does an interesting coverage of other civilizations, and attempts to explain what factors prevented them from making the same leap that occurred in Europe. This book situates the global context of wealth and poverty that exists today.

3. The Wisdom of Crowds (2005) by James Surowiecki.

A recently-published book that has already become a classic in some circles, The Wisdom of Crowds explains why decentralized knowledge informed by self-interest can result in highly accurate predictions. Contradicting the common opinion that experts are better at predicting outcomes than ordinary people, Surowiecki finds that not only are supposed “experts” much less accurate than they claim, but that guesses taken by ordinary people when aggregated are far closer than any single estimate. As this is the principle which guides most markets, it offers a compelling insight into why those systems work so well.

4. The Housing Boom and Bust (2009) by Thomas Sowell.

Probably the most important and relevant book on recent financial history there is to read. Unlike many other treatments of the financial crisis which focus the blame on one particular party, Sowell constructs a multi-faceted picture, including all the relevant policies, government decisions, and lobbying groups whose efforts unintentionally led to the recent financial crisis. He also debunks the common perception that “markets run amuck” caused economic downturn, and instead traces the series of government intervention which built the housing bubble and then led to its collapse. For anyone is convinced that more regulation can save the economy, this book will give reason to rethink that position.

5. Failure and Progress: The Bright Side of the Dismal Science (1993) by Dwight R. Lee and Richard B. McKenzie.

An interestingly prescient (but little known) book, this short publication by the CATO Institute explains why it’s best if the government stays out of the way when a business begins to fail. It exposes the inherent contradiction in political positions which desire the wealth which capitalist systems can attain, but also want to prevent the painful dislocations created by business failure or bankruptcy that occurs under a free market. Lee and McKenzie convincingly explain why wealth for all is impossible without failure for some enterprises; unprofitable businesses represent a misuse of society’s resources, so it is better they fail so those inputs can be put to better use by other firms. When government becomes involved in preventing failure it ends up creating further deprivation, by favoring producers with connections over those who can provide goods using the fewest resources. Political victories for inefficient producers are a loss for society.

6. The Mind of the Market: How Biology and Psychology Shape our Economic Lives (2008) by Michael Shermer.

This book does an excellent job of summarizing recent research in behavior psychology, neuroeconomics and similar fields, and explaining how they relate to behavior in a free market economy. While many studies show that humans have an altruistic, egalitarian and cooperative element to their interactions, this does not deny the role or importance of markets in shaping social behavior in positive ways. While a slightly more challenging read than some of the other books, The Mind of the Market provides a comprehensive look at how psychology and evolution have played a role in shaping economic interactions.

7. The Only Investment Guide You'll Ever Need (most recent edition in 2011) by Andrew Tobias.

The first edition of this book was written back in the 70s, and since then it’s sold millions of copies world-wide. The premise: if a deal sounds too good to be true, it probably is. Tobias happens to be both very smart about money and also a highly enjoyable read. I went through this book several times as pleasure-reading when I was too young to understand what money, investing, or economics even was and still found it very entertaining. To secure your future wealth and have a good time doing it, this is probably the best book you could purchase.

It might seem from these summaries that I’ve chosen a highly partisan, libertarian or even “conservative” set of books to represent economics. While I will not claim this is the definitive “best books” list, in my personal and limited experience, I found the ideas contained very useful in interpreting economic events. There are obviously some giants not represented (Friedman, Hayek, and so on) but most of the relevant ideas can be found above. The summaries are just my biased take, but I honestly believe that all of these books are written from an open (if not apolitical) perspective. Even if you disagree with the conclusions, the analysis contained is worth thinking about for anyone.

The point: If someone wanted a crash-course on economic thought with a minimum of fluff, jargon, or general verbosity then the above list would be the direction I’d point them. If you think I left off something important or just disagree with all the above then let me know in the comments.

How to live rent-free the rest of your life. OR, Five Big Mistakes Criminals Make During Police Interrogations.

 "...the technique of violence was first developed in 2 million B.C. by the australopithecines and tried by forthwith primates, who had no brains to speak of, but nonetheless invented the tomahawk and used it on each other. This practice led to the enlargement of the brain, another useful weapon. Yes, murder was invented even before man learned to think. Now, of course, man has become known as the 'thinking animal.'"
- spoken during the credits of Death Race 2000 (1975).

One of the reasons I love reality television is that it can make you feel like an expert in fields you have no personal knowledge or training in whatsoever. From watching many episodes of A&E's crime show, "The First 48" I feel pseudo-enlightened about the workings of the criminal justice system, and I'm here to share that almost-wisdom with you.

"Coupon Lady Money Saving Madness" is madness indeed.

So, I found a video on the internet which should have bargain-hunters, cheapskates, and economists (to be redundant) foaming at the mouth. By using coupons and mail-in rebates, a woman was able to cut her grocery shopping bill down from over $150.00 to just $9.43. Find the video here. So why isn't everyone saving 97% on their shopping, and putting the grocery stores out of business?

The reason most people don't do this (and never will) is because it's inefficient. Yes, it's very impressive to see someone save ~$145 off their groceries, but the real question is how much time did it take, in coupon saving, organization, and so on, in order to accomplish that? The woman in the video said she collects coupons, sends in rebates, and plans all her shopping in advance... If it took her 14 hours, she effectively earned $10/hour for her coupon-clipping work. However, I'm guessing it took longer than that, and her "wage" was actually much lower.

For people who have jobs, it'd be more effective to spend those extra hours working than clipping coupons. If you don't have a job or are paid a very low wage, coupon clipping could make sense. However, there are a variety of other ways to make money on the internet - filling out surveys, using ShortTask, or advertising on Twitter - to name just a few. For an hourly rate, you can almost certainly do better than coupons.

If you're a college student, spend that time studying instead -- you're going to school to make more money later, so focus on grades, not penny-ante coupons (unless you're studying english or sociology, in which case I suggest dropping out and coupon-clipping full time, because it'll be more profitable).

There's an efficient level of coupon saving, which depends on your income and how you value your time. For highly paid professionals, the efficient amount of coupons might be zero, while some others may gain a small benefit from spending their time that way. Taking coupons to an obsessive level, as this woman appears to have, is just wasting time for yourself and everyone in line behind you.

Attention Undergrads -- you're still paying for all those classes you skipped.

Graph made by Mark Kantrowitz of FinAid.org

We've reached a momentous, but little celebrated moment in financial history. Credit card debt has been surpassed by student loans (including both federal and private). Let's give a big 800 billion cheers for education!

You can see this trend in the graph to the left. Notice how in 2008, credit card debt peaked and has now declined, while student loan debt has gone up at a steadily increasing rate. The modern family unit (mom, dad, and the federal government) have been paying a larger and larger bill, and for those who can't afford it, the slack has been taken up by private lenders. Unlike credit card bills, which fluctuate with the larger economic climate, student loan debt just kept going up and up.

Education is always a good investment, right? With costs of tuition rising by 8% per year, one might expect students would soak up every valuable minute of classroom instruction. That hasn't been the case. While tuition rates have gone up steadily, student attendance has gone down. This trend has been especially strong in recent years. According to Blair Hedges, a biology teacher,