Showing posts with label economics. Show all posts
Showing posts with label economics. Show all posts

Monday, December 2, 2019

Anarchocapitalism and The Vulnerable World Hypothesis

Anarchy in the 21st CenturyAnarchocapitalism (AC) is quite the interesting political and economic philosophy that is more plausible than one might initially suspect. It is a subset of anarchist thinking, where our capitalist economic system would extend to all aspects of society, including law, politics, healthcare, and more.
Unlike other anarchist philosophies that optimistically (unless you think AGI isn’t optimistic) hope for a better world without any clear mechanism for how such a society would realistically structure itself without at least some market structure (socialist/communist based anarchy), AC merely proscribes an extension of our market system to all aspects of human interaction.
David Friedman, a renowned legal economist, is perhaps the world’s leading proponent of this anarchist school of thought, espoused thoroughly and articulately in The Machinery of Freedom. As he sees it, the problem with the minarchist position (a libertarian government based on the absolute minimal government possible) compared to full blown anarchy is if you think the government is bad at producing shoes, cars, and pork, then what makes you think it would be good at producing the legal framework in which we trade said goods?
David Friedman described the difference between his more radical position and his father’s, Milton Friedman, the legendary libertarian and Nobel Prize winning economist, as Milton thought AC might work, but probably wouldn’t, while David thought AC might not work, but probably would.*
Here, I will first provide an overview of AC, attempting to defend it against superficial arguments. I won’t address moral arguments for AC from proponents such as Murray Rothbard,** but instead look at consequentialist arguments (due to the “positive” prediction that such a world would look positive). I argue that AC would be neither stable (hence possible) nor libertarian based on Nick Bostrom’s recent paper “The Vulnerable World Hypothesis.”
*From now on, I’ll be referring to David Friedman, unless otherwise stated.
**I agree with Friedman that such moral arguments are not well grounded.
Source: Atlas Society
Violence, The Most Obvious Rejection of AC
As surprising as it may sound to the uninformed, Ayn Rand was not nearly the most radical capitalist. In fact, she argued against AC, concluding that a full extension of capitalism would lead to a war of each against all. This school of objectivism therefore requires a minimal amount of government to defend property rights, rule of law, and free markets.
Rand couldn’t see a mechanism for solving legal, and especially criminal, matters without centralized government. If I’m bigger than you, then I can bully you into giving me whatever I want. However, as Friedman rightfully points out, even primitive animals exhibit a natural defense of property rights that clearly needs no centralization.
The stable equilibrium is for animals to defend their own territory, even to the point of incurring large costs, but not to attack others unless they have a significant physical advantage. (In many ways, this is the evolutionary basis of loss aversion.) Constant war is simply too costly, although certainly not entirely avoidable.
Since under AC there’s a market for everything, security and insurance firms would evolve to protect you from your neighbor stealing your wife. If you both hire the same neighborhood security contractor SecureMe, they would have an incentive to accurately investigate violations to maintain their reputation and prevent you from joining their biggest competitor SecurityRUs.
What if SecurityRUs and SecureMe have a beef? Since we are talking (in game theoretic terms) of a repeat game, competitors would agree in advance to avoid physical conflict and arbitrate any disputes with the reputable Judge Judy, who is known as being fair and totally not obnoxious.
And, much like Android, iOS, and Windows evolved in a competitive landscape, the invisible hand would create a mesh network of laws, conducive to local customs while general enough to allow international commerce.
What about if you get hit by an uninsured mobster? Every company would have an incentive to pool funds and establish jails. If you can’t afford insurance, hopefully a family member could spot you for a couple of years.
While that may seem like a cut throat society, as an economist, you can’t simply dismiss apriori the negative consequences of the welfare state or the possibility that private charities may get crowded out by government funds.* The AC argues that on net balance such a world would be far preferable by assuming only moderate libertarian beliefs.
Many are rightfully skeptical at this point as to whether or not this system could scale in all situations. The AC would point to ancient Viking societies and our modern privately arbitrated tech patent resolutions as plausible real world alternatives to centralized legal systems, ranging from the size of a village to global corporations.
Additionally, they would point out that our current approach is far from perfect, from racially biased criminal justice systems based on rent seeking prison profiteers to state sanctioned human rights violations. I, for one, am eager to listen to any radical suggestion for prison reform, because our current system destroys lives and generally sucks. Then again, I’m not so sure an entirely free market prison system is moving towards the correct trajectory on this one.
On the other hand, such a hypothetical AC world would likely be libertarian, since I am willing to pay dearly to prevent you from selling me into slavery but not so willing to prevent you from doing bath salts. So, drugs and prostitution would likely be legal, but violent crime would not.
As long as you don’t break into my house to steal my opioids, we’re all good. If not, then I have a right to use a bazooka on your tweeking ass, happily collecting my reimbursement check for a new front wall (assuming a willing underwriter).
As absurd as much of this may sound, private security firms thrive in countries where government enforcement is weak, such as Central and South America and Africa. Personally, I don’t find fault with experimenting in part with decentralized forms of legal structure. What is bitcoin, after all?
Instead, I believe edge cases could prove the downfall of such a system, perhaps where a small group of individuals amass too much power and de facto create a centralized government. Hence, I question the stability of AC over infinite time periods, but for now, let us grant that AC would remain stable by assuming competitive pressures would equalize or at least limit individual power over time.
*In some sense, this is the ultimate antifragile/ skin in the game system, although Nassim Taleb would likely reject it as unstable due to the minority rule.
A Flaw in DemocracyIn fact, ACs like Friedman claim a general argument against government. Namely, concentrated interests beat dispersion every time. The Confederation of Copper Coin Companies will lobby to keep the penny as currency, even though each of us individually fucking hates pennies.
At the same time, voters are incompetent, not because they are stupid, but because they have no incentive to spend hours watching political commentary when their vote is insignificant compared to the trillions spent lobbying. While most would argue this is a necessary evil, the AC asks if you would really miss your local sleazy politician who you usually only agree with 60% of the time anyway?
Textbook Microeconomics: Sell the Streets, and Everything ElseWhat does your stereotypical out of touch academic economist say about AC? Well, as long as we assume homogenously exogoneously uniform transitive rational preferences, infinitesimal market size, symmetric information, perfect competition, and no externalities in all markets, no economist would ever object to AC. But while a perfect representation of your classroom economist, this is an unfair caricature of AC.
Libertarians have been arguing for decades that private monopolies and cartels are notoriously difficult to maintain without government intervention/regulation (support). If a company is making extremely high profits, rest assured other big companies would want a piece of the action. I actually have quite a bit of sympathy for this view, as historically, most monopolies are supported by heavy regulation that raises the barriers of entry to potential smaller competitors.*
Open up Xfinity to thousands of local entrepreneurs and their customer service will improve real fast. In the age of network effects (Google, Facebook, Amazon, etc.), however, I leave it to the reader to decide if natural monopolies are as unlikely to thrive as they have been in the past, and whether anti-trust law should correspondingly evolve.
Symmetric information and rational preferences are mathematical constructs that AC need not assume. The AC would point out that you can’t phish for fools in a highly competitive market; or at least, it can’t be worse than our current system. Certainly, pockets of stupidity would thrive, but the system as a whole would be antifragile thanks to skin in the game.
Patents wouldn’t exist, but neither would trolls. Roads could be toll financed, and firefighters would be part of your insurance package. Private philanthropy would thrive thanks to the lack of governmental crowding out. Healthcare would be more affordable without bureaucratic inefficiencies, and the 2008 financial collapse wouldn’t have happened without central bank distortions and politically sanctioned moral hazard in the housing market.
But, in David Chalmer’s words, now comes the hard problem: externalities and military conflicts.
*Not to mention how inaccurately our school history books teach regarding the rise of the railroad, oil, and auto companies.
Free Not To ChooseAn externality occurs when a 3rd party benefits or loses from a transaction you and I engage in. I might be writing this paper for only Nick Bostrom and David Friedman (both of whom will likely never see it), but now you guys all get to benefit! On the other hand, I like cheap meat and oil as much as the next guy which would probably destroy the planet even faster under AC.
Not so fast, says the AC. As Milton Friedman pointed out in Free To Choose, the government itself creates externalities (smoke stacks), the negatives of which far outweigh the positives in the AC’s view. But a military conflict changes the dynamics of this calculation, as even David Friedman admits.
As a classic tragedy of the commons, if a military chooses to protect a certain area, everyone there benefits from the positive spillovers. Yet in an AC society, I am welcome to not join the Defense Forces of Denver. A free lunch. Everyone comes to the same conclusion, hence no one joins the military. And the damn Canadians invade us.
Nothing centralizes power like a military threat, especially a perceived one. Here’s where the fatal flaw in AC lies, in my view.
A Black Ball in the UrnNick Bostrom is one of the most unique philosophers alive today. He’s the kind of guy who would be wearing a tin hat if he was born a century earlier. Bostrom rose to notoriety after popularizing the surprisingly plausible simulation argument (more on that forthcoming) and has backing from the Elon Musks of the world thanks to his alarm bells regarding artificial general intelligence safety.
So when he again comes up with a terrifying and convincing thought experiment that could radically change the entire nature of society, your ears should prick. Bostrom asks us to imagine the horrendous: what if instead of being extremely difficult to procure, produce, and deploy, nuclear bombs could detonate by placing two pieces of glass in some sand and running an electrical current through them? There would be no school shooters; a single lunatic could turn Atlanta into ashes. Let us call such an individual The Joker.
Whoa, whoa, whoa, let’s not just panic, the Steven Pinkers of the world say. There’s no point in thinking like that little Johnny, clearly we know in hindsight that nuclear bombs are very hard to create. And there’s less violence than ever!*
But the point is we can’t and didn’t know that back in World War II. The race to create a nuclear bomb occurred after a couple of physicists ran the math, shat their pants, and, having no clue if it would be easy to make and the Nazis would beat them, spurred the most important scientific undertaking in human history through the Manhattan Project.
If nuclear bombs grew on trees and activated upon exposure to H2O, civilization would halt, likely never again advancing beyond rural communities, quite plausibly operating under AC that no proponent would support. Such a world, in Bostrom’s ever darkly poetic words, would have drawn a black ball from the urn.
*Sorry, I just finished reading Skin in the Game, and Nassim Taleb throws some heavy shade on Steven Pinker.
Since most of us don’t know what an urn is: Credit
Bostrom asks us to imagine that every time we develop a new technology, whether its GMOs that create super bugs, a virus with no cure, oil that destroys the planet, or AI that takes over the world and converts our brain into silicon to unify quantum mechanics and general relativity, we are drawing a ball from the technology urn.
Most technologies are white balls, those that will have mostly or entirely positive impacts. Gray balls are technologies that have both positive and negative impacts such as cheap oil. Black balls may or may not exist; these are balls that result in the destruction of any civilization that discovers them. This is usually because the technology is sufficiently destructive and sufficiently easy for a minority of the population to acquire and use against the rest of the population.
Given that by definition no one can possibly prove in advance that black balls do not exist until said technology is discovered/invented, Bostrom conservatively claims that the probability of a black ball existing could be non zero.
Vulnerable World Hypothesis (VHW): P(B exists) > 0
As an economist, I deal in expectations. Even if the P(B exists) == 0, the expectation could (and should) be non zero. Furthermore, self selection is no argument that P(B exists) = 0, since any population (such as our own) is alive until they draw a black ball. Therefore, today’s world exists in the following state:
Vulnerable World Expectation (VHE): E[P(B exists)] > 0
Surely, there must be a way to purchase civilization wide insurance such that E[P(B exists)] = 0. We need to, in fact, since a vulnerable world is in some sense that biggest externality of all. Existential threat is an irreversibility.*
Bostrom argues convincingly that the only way to get E[P(B exists)] = 0 is through terrifyingly Orwellian means. Namely, thanks to the “diverse motivations” of earthly people, we need at least one of the following to occur:
  • Restricting Technological Development
  • Preference Modification of Extremist Ideology (those willing to use tech simply Joker-style)
  • Extremely Effective Preventative Policing
  • Effective Global Governance
The first two are likely impossible under all structures, but certainly under AC. The last two sound innocuous until you look under the hood.
*I would argue that E[P(B exists)] > 0 is worse than P(B exists) > 0 because the expectation is what creates the race dynamics that leads to a winner take all scenario at the sacrifice of safety. This could be especially terrifying in a race for AGI, since AGI is simultaneously the solution to global governance and could be the black ball.
2084Let’s assume a black ball is drawn from the urn. Some mad scientist discovers a simple way to DNA sequence a virus without cure using a common 3D printer. She publishes her manifesto via Tor, using VPNs and public key encryption, with detailed instructions on how to recreate. How could we stop others from using it, or, even better, have prevented her from publishing it in the first place? Well, unfortunately, there is simply no way to do this without a global surveillance system.
Something or someone would need to watch what every single person and organization does at all times. Otherwise, a single Joker could reign chaos upon the world. Furthermore, we need global governance, in Bostrom’s words, to protect global commons and to “exit the semi-anarchic default condition.”
I know, I know. You’re begging me to tell you there’s a simple flaw missing in this reasoning. Surely a global surveillance and world order is overkill for a little thought experiment? Unfortunately, I don’t think there’s any other way to eliminate the Vulnerable World Expectation. That’s in today’s world and today’s governmental system. AC has no governmental system.
Anarchocapitalism in a Vulnerable ScenarioTo do some fake math, let’s assume a network interaction between people drawn from the following probability distribution.
Distribution(
Jokers, Steven Pinkers, Physicists, Economists, Philosophers, Evil Corp
)
The Steven Pinkers make up at least 95% of the population. These people are not worried at all about existential threat. Everyone else adds up to 5%, at ~1% each. Evil Corp is a misnomer. They really should be called Do Little Evil Corp. In other words, we don’t need to assume nefarious preferences on behalf of Evil Corp; some companies will out of self preservation believe VWE.
Let’s assume we are operating in a world governed by AC. Break up the world into t time intervals, from t0 to tN, where tN is the life of the universe.
At some point in time, tB, the physicists make some potentially black ball urney type discovery like the nuclear bomb. Then, say at tV, where tB≤tV, a Nick Bostrom philosopher type will discover the VWH. This simple discovery will result in VWE, since now many individuals could believe our world to be vulnerable.
In any random world, tV would probably usually be plus or minus a couple of millennia from now, depending on the level of technological sophistication and discoveries (nuclear, nanotechnology, biopharmaceuticals, etc.) of such a society. And to stroke my ego a little, let’s say tVMe is the time period where an economist realizes that the AC society they are living in might be unstable due to VWE. Usually, tVME > tV, since economists like myself are late to this whole “accurately describe reality” game.*
Here’s the kicker. Even if there is a flaw in Bostrom’s thinking (which there probably isn’t, the dude’s a savant), a non trivial portion of the population might begin fearing what would happen if another group of people discovered a black ball in the urn.
I’m certainly not assuming perfect rationality. They would conclude that something must be done. That something and only thing, per Bostrom’s thesis, is a global surveillance system and global government.
The Steven Pinkers of the world become irrelevant, due to the minority rule.** Since we are talking about the ultimate winner takes all situation, suddenly we have an incentive to create the damn thing, since if an opposing group of individuals beats us, the world is doomed.
The physicists blast full steam ahead,*** with some Jokers sprinkled throughout. The economists and philosophers ring the alarm bells. Finally, Evil Corp funds the physicists. Either a Joker wins and there was a black ball in the urn, or Evil Corp succeeds in quashing the future expectation that there is a black ball in the urn by establishing a global surveillance program with global governance.
Winner Take All Scenario
Stability in AC: Either[Joker → P(B exists) == 1, Evil → E[P(B exists)] == 0]
Evil just stands for any company in an AC society, be it OpenAI (Philosophers/Economists), Google (Self Interested), or Huawai (possibly nefarious). Point is there’s no government, so the deepest pockets will likely win.
Deeper point, either a Joker or group of Jokers will destroy the world, otherwise the system is unstable until some company quashes the expectation of a vulnerable world by establishing a world government and surveillance system.
So, back to my original argument that AC would be neither libertarian nor stable, virtually no libertarian would support such a surveillance program. The risk of misuse would be much too high. But in an AC world with no pesky governments, corporation Hooli, led by the egomaniacal yet civic minded Howard Roark, would take it upon itself to establish a world order.
In conclusion, this world would certainly not be libertarian. It could possibly reach stability after removing VWE, but would it conceivably remain AC? Plato’s forms are relevant here. Is a society controlled by a small group of executives running corporation(s) maintaining global surveillance to protect the world order really that different from a centralized government (or our current world for that matter)?
* tVMe = 1939
**I really have nothing against Steven Pinker. I actually like his optimism!
***In WWII, it was the physicists. WWIII might just come down to the computer scientists. AKA Evil Corp = Google and the black ball is AGI 😮

Friday, December 6, 2013

Alcohol and Marijuana: Substitutes or Complements (8 to 12 Minute Read)

Update: This post was originally written in 2013. After 5 more years of evidence, its conclusion of substitution between alcohol and marijuana and the public health benefits of marijuana legalization have even more evidence and relevance.

Over at Reason.com, there's an article up about whether pot and alcohol are substitutes or complements. As author Jacob Sullum notes, this could be very important for policy makers to determine whether or not marijuana should be legalized. Since many view weed as less harmful than alcohol, whether legalizing will lead to net public health benefits hinges on this economic question.

So, what are "substitutes" and "complements," how do we classify weed and alcohol, and why does this affect what policy should be pursued?

Substitutes and Complements
Substitutes and complements are terms that refer to how people purchase/ consume two different products or services. Do you buy them together (complements) or are they used in place of each other (substitutes)? Technically, economists are interested in whether price changes vs amount purchased are positively or inversely correlated.

For example, if the price of oranges goes up, you will probably buy more apples because they are somewhat similar. In manufacturing, aluminum is often a substitute for steel. On the other hand, complements are products that go well together. Examples of these include peanut butter and jelly, television sets and DVD players (increasingly becoming an obsolete example), or popcorn and a movie. Interestingly enough, if the government banned Netflix and other streaming platforms (quit hyperventilating it's only hypothetical), economists would expect the price of popcorn to decline.

There are at least a few pieces of evidence that should lead us, perhaps contrary to popular opinion, to conclude marijuana and alcohol are substitutes. While not always true (think cross-fading), from a public policy perspective, the evidence is abundant.

Economics of Alcohol and Marijuana Purchasing
Two economists, D. Anderson and Daniel Rees, examine whether marijuana and alcohol are complements or substitutes in The Legalization of Recreational Marijuana.  Previous research attempted to estimate the relationship between Mary Jane and alcohol by using price changes or comparing nearby city or state policies (using cross-sectional studies), but as they point out this can often lead to spurious results since many unseen, hidden, correlated, or random factors can significantly affect the conclusions. For example, studies that compared Utah vs. Colorado do not consider the cultural differences between the people of these states. (AKA those Mormon's don't drink coffee, smoke weed or tobacco, consume alcohol, or otherwise sin in any fashion.)

The Gold Standard of Microeconomics
This is why economists generally prefer to look at natural experiments. Ideally, we could run a truly  randomized experiment like what is done in controlled medical studies.  Wouldn't it be nice if we could settle the perennial question of minimum wage's effect on employment by randomly assigning each US city with a different wage rate? A randomized experiment is so powerful because there is a control group and a experimental group who's variables of interest vary as defined by researchers. The researchers can then retroactively go back and look at how their tweaks resulted in differences between the control group and experimental groups, and if the groups studied are quite large (or large enough), we can be very confident in the statistical validity of those differences.

Here's an interesting blog post about the change in economics from a "theoretical" disciple to a more scientific one. Credit Noah Smith

While there has been a push to attempt truly randomized control trials (RCTs) in economics, and particularly in developmental economics, this is usually quite tricky. Instead, it is often easier to look at "natural" experiments. In this case, a researcher isn't controlling variables, but is looking at observational (historical) data and trying to define or find a natural change that looks as similar as possible to a randomly controlled experiment.

In general, policy changes are often great natural experiments since many other factors remain constant, and we can simply look at before and after the policy took place. Additionally, when the policy at hand is decided at a more local level, we can compare changes across a larger group. If a federal law is passed, we don't necessarily have a control group. But if a few states change laws while a few others don't change, we can tease out some of the hidden/ random variables by comparing the resulting differences and feeling assured that the policy is in fact the cause. In the case at hand, economists have looked at changes in the minimum legal drinking age and changes in medical marijuana laws.

Changes in Minimum Legal Drinking Age
As Anderson and Rees note, there is a decrease in marijuana consumption starting at age 21, which would appear to be evidence that marijuana and alcohol are substitutes. However, it is possible this is due to other random factors; that is, until we look at places where there used to be the more sane drinking age of 18. The data suggests in places where the drinking age was 18 people would start smoking less weed at 18; then, when those states raised the drinking age to 21, people wouldn't start smoking less weed until 21. That is quite strong evidence that marijuana and alcohol are substitutes, as well as elucidating the effectiveness of natural experiments.

Changes in Medical Marijuana Laws
Since lots of states changed their medical marijuana laws at different times, this is a great natural experiment based on state by state differences and time differences. This allows us to see drops in heavy drinking among younger age groups of 18-29, as well as drops in beer sales by as much as 5%.

Additional Evidence of Substitution
Stock Prices are Inversely Correlated
Additionally, investors understand that legalizing marijuana isn't going to lead to more consumption of alcohol and opioids but less. In other words, marijuana stocks are competing for investor's money away from these industries. As such, we would expect the stock prices of these industries to be inversely related. This is what we see in the data.

Tilray is a Canadian marijuana company that became the first reefer madness company to be listed on the Nasdaq in June 2018. Its been one of the highest performing IPOs in recent history, and also one of the most overvalued. Compare that to good 'ole Budweiser stock and you can see the decline. While the graph change seems subtle, Anhueser Busch is an extremely mature stock, with a market cap of ~$150 Billion, meaning that subtle 16% decline over 3 months corresponds to a drop of about $20 Billion in the value of BUD in anticipation of Canadian marijuana legalization October 17th. 



Surveys Indicate Declines in Alcohol Usage
The graph below is of middle and high school students drinking habits before and after marijuana was legalized in Colorado. The drop is significant, but perhaps contradicted by the fact that marijuana usage is also down among this younger age group. I leave it as a puzzle for the reader to decide why this anomaly of decreases in both alcohol and marijuana post legalization exists. (Hint, did you ever feel rebellious in high school?)




More direct evidence from a more relevant age group in Colorado is that "the number of 18-to-25-year-olds using alcohol on a monthly basis fell by four percentage points between 2014-2015 and 2015-2016." It's pretty obvious that this age group is definitely substituting alcohol with more of something. Try walking through Denver for more than 10 minutes without smelling weed. 

Public Policy
All of this makes sense, even if initially counter-intuitive. While it may seem like cross-fading is extremely popular, in the aggregate this is a minority of consumption. People who choose to drink alcohol or smoke marijuana are usually trying to either relieve stress, have fun, loose control, and/or relax. Since both alcohol and marijuana achieve these same goals, people tend to use them as replacements. While obviously some people use them together to enhance some of these effects, this is a minority rather than a majority, as is indicated in the above facts. Cross-fading normally happens while partying or binging; most days you (who said anything about me) pick one or the other.

Traffic Fatalities
Why does this matter? As Steve Levitt finds, "legally drunk drivers pose a risk 13 times greater than sober drivers" for getting into an accident. On the other hand while studies are much sparser, people who drive soon after consuming marijuana are only 2 times more likely to get into an accident compared to a sober driver. While still impaired, these drivers often drive slower and take less risks. This means that if people use marijuana in place of alcohol then we would most likely expect lower rates of car accidents. This is what Anderson and Rees find; states where medical marijuana is legalized see on average a 13% drop in traffic fatalities. This is certainly unexpected, and most people would prefer to not even consider these facts in such a cold-hearted economical manner, but it's nonetheless true. The youngest age groups (18 to 29) are most likely to be involved in accidents, and they are also most likely age group to shift their consumption towards marijuana in states where it becomes legal.

Addiction 
Also, looking at how addictive marijuana is compared to alcohol and other drugs, marijuana generally comes out at or near the bottom of the list:

Comparing Addictive Qualities of Popular Drugs


Source: https://www.drugwarfacts.org/cms/Addictive_Properties#sthash.vUS1SpC8.dpbs

This means that if people substitute alcohol with marijuana we can expect there to be drops in addiction levels/ alcoholism. If they were complements, then we would expect an increase in these issues.

Opioid Usage
Thinking of the opioid crisis is depressing no matter what. But again, Colorado's legalization of marijuana appears to have lowered what would have been a dramatic increase compared to the rest of the US. This is why big pharma is leading the push against marijuana legalization.



Violence
Finally, people who are under the influence of alcohol are usually more violent than people who are under the influence of marijuana, unless you believe Reefer Madness. This means that there should be lower levels of violence as marijuana becomes more available. While the evidence is less clear in cases of domestic violence, cartel related crime has fallen massively in states bordering Mexico after legalization efforts. Researchers "found that among the border states the effect of the change in law was largest in California, where there was a reduction of 15% in violent crime, and weakest in Arizona, where there was a fall of 7%. The crimes most strongly affected were robbery, which fell by 19%, and murder, which dropped by 10%. Homicides specifically related to the drug trade fell by an astonishing 41%."

As any economist would tell you, there are forces working in the opposite direction. You might think that as marijuana became more available people would become more lazy, and there may even be higher rates of psychosis. Obviously, many people are concerned about marijuana being a gateway drug. One thing is certain; more people would have the munchies. But come on, are these issues really worth the aforementioned public health benefits?

The conclusion to draw from this in evaluating public policy is that it is crucial to ask "compared to what?" Someone might argue that legalizing marijuana will lead to more of the bad things associated with smoking marijuana. However, it also lead to less of the much worse things associated with drinking alcohol, such as violence, traffic fatalities, addictions and overdoses. It seems abundantly discernible which is the better outcome.