Policy makers in the US and Europe seized on the paper as proof that cutting stimulus and social programs was a good idea, and proceeded to do so with abandon. Of course, right wingers wanted to cut money to social programs anyway, and would have done so regardless, but the paper was held out as scientific proof that it was a solid plan of action.
I won’t comment on how strange it was that Republicans were interested in science at all, given recent efforts to politicize the NSF and micromanage the grant decision process.
The trouble was that the results presented in RR were shown to be based on the selective use of data. Thomas Herndon, a 28-year-old graduate student, obtained the dataset from RR themselves and couldn’t reproduce the results.
In fact, he found that the only way to accurately reproduce the results in RR’s paper that showed that high debt restrained economic growth was to exclude important cases. When including the missing data, high debt was associated with consistently positive growth, though modestly slowed.
Originally, I took the view that this was a case of sloppy science. RR had a dataset, got some results which fit the narrative they were pushing and didn’t pursue the matter any further. Reading Herndon’s paper, however, I changed my mind.Herdon took the data and did what any analyst would do when starting exploratory analysis, he plotted it (see figure on the right). Debt to GDP ratios and growth are both continuous measures. We can do a simple scatterplot and see if there’s any evidence that would suggest that the two things are related.
To me, this is a pretty fuzzy result. Though the loess curve (an interpolation method to illustrate trend) suggest that there is *some* decline in growth overall, I’d still ding any intro stats student for trying to suggest that there’s any relationship at all. There is no way that RR, both trained PhD’s and likely having the help of a paid research assistant, didn’t produce such a plot.
Noting that the loess curve drops past approximately 120%, I calculated the median growth for each country represented. Only 7 countries have had debt to GDP ratios greater than 120% in the past 60+ years: Australia, Belgium, Canada, Japan, New Zealand, the UK and the United States. Out of these only two had (median) negative growth: Belgium (-.69%, effectively zero) and the United States (-10.94%), which has only had a debt to GDP greater than 120% one time. All other countries has positive growth under high debt, even beleaguered Japan. New Zealand can even claim a strong 9.8% growth under high debt. The US, then, is a major outlier, possibly bringing the entire curve down.
As this doesn’t fit their story, RR’s solution was to categorize debt to GDP ratios into five rough classifications, and calculate the mean growth within each group. This is a common trick to extract results from bad data. It’s highly tempting for researchers (and epidemiologists do it far too often), but a bad idea to present it without all the caveats and warnings that should go with it.
I’m not surprised that ideologues such as RR would be so keen to produce the result they did. After all, they published the popular economics work “This Time Is Different: Eight Centuries of Financial Folly” where they try to suggest that budget policy of the US in 2013 should somehow be informed by the economy of 14th century Spain.
I am, however, surprised that reviewers let this pass. If I would have been a reviewer, I would have:
1) pointed out the problems of categorization, where data doesn’t require it
2) noted that categorizing the data (or even plotting it) tears out temporal correlation. For example, one data point from 2008 (stimulus) may be put in the high debt category, but another from 2007 (crash) in the low debt category. While budgets of one year may have little to do with the budget of another, the economy of one year is likely related to the economy of the previous year.
3) questioned the causal mechanisms behind debt and growth. This is obviously a deep question for economists (and not epidemiologists), but of particular import. When does the economy start to react to debt? I’m pretty sure that there is a lag effect as spending bills tend to space disbursements over the course of the fiscal year.
The RR debacle should be a lesson, not only to economists, but to all scientists. While we may always be under pressure to produce results and hope that those results fit and support whatever position we take, shoddy methods don’t get us off the hook. In RR’s case, I would call this fabrication. A good many studies are merely guilty of wishful thinking, but the chance always exists that someone will come out of the woodwork and expose our flaws. After all, that’s what science is all about.
A couple of weeks ago, I attended a lecture on network analysis where the investigators analyzed popular political books on Amazon.com.
Amazon lists not only information on the book but also the titles, in order of purchasing frequency, of other books that customers may have purchased. The researchers here were able to identify left leaning and right leaning books by examining the purchasing habits of Amazon customers.
Decibel “is America’s only monthly extreme music magazine” and has been in publication since 2004. Every year, they publish the titles of the 40 best metal records of the year, according to their review staff.
Here is 2012′s list:
40 Gojira – L’Enfant Sauvage
39 Meshuggah – Koloss
38 Agalloch – Faustian Echoes EP
37 The Shrine – Primitive Blast
36 Incantation – Vanquish In Vengeance
35 Samothrace – Reverence To Stone
34 Devin Townsend Project – Epicloud
33 Panopticon – Kentucky
32 Saint Vitus – LILLIE: F-65
31 Mutilation Rites – Empyrean
30 Author & Punisher – Urus Americanus
29 A Life Once Lost – Ecstatic Trance
28 Asphyx – Deathhammer
27 Farsot – Insects
26 Gaza – No Absolute For Human Suffering
25 Inverloch – Dark/Subside
24 Swans – The Seer
23 Horrendous – The Chills
22 Killing Joke – MMXII
21 Early Graves – Red Horse
20 Liberteer – Better To Die On Your Feet Than Live On Your Knees
19 High On Fire – De Vermis Mysteriis
18 Napalm Death – Utiltarian
17 Torche – Harmonicraft
16 Grave – Endless Procession Of Souls
15 Satan’s Wrath – Galloping Blasphemy
14 Testament – Dark Roots Of Earth
13 Cattle Decapitation – Monolith Of Inhumanity
12 Blut Aus Nord – 777: Cosmosophy
11 Municipal Waste – The Fatal Feast
10 Pig Destroyer – Book Burner
09 Paradise Lost – Tragic Idol
08 Royal Thunder – CVI
07 Enslaved – Riitiir
06 Neurosis – Honor Found In Decay
05 Pallbearer – Sorrow and Extinction
04 Witchcraft – Legend
03 Evoken – Atra Mors
02 Baroness – Yellow & Green
01 Converge – All We Love We Leave Behind
I looked all of these records on Amazon. For each of them, I noted which of the others were in the first 12 titles that were purchased with it, creating a 40 by 40 adjacency matrix where rows (i) and columns (j) represented records. For each entry, a zero was noted where the customer which purchased the i-th record did not purchase the j-th record, and a one where they did.
I found that many of the records on the list were purchased with one another. The most common record purchased in combination with another on the list was Neurosis‘ “Honor Found in Decay.” Fifteen of the other records on this Top 40 were purchased with “Honor Found in Decay.”
In network terms, the Degree of this record would be 15. Pallbearer’s “Sorrow and Extinction” had a degree of 11, Royal Thunder’s “CVI” and Blut Aus Nord’s “777: Cosmosophy” both had a degree of 9.
The network of Decibel’s Top 40 looks like this:
You can see that some records get purchased with other records more than others. The size of the dots represent the degree of the record.
Now, I did some cluster analysis on the data, looking for related groups of records within the network. Using R, I produced the following dendrogram:
There are two major clusters, each with its own subcluster (dendrograms are hierarchical). One includes Converge, Neurosis, Pallbearer Royal Thunder, Evoken and Inverloch with a subcluster including only the first four. These are all bands that might be expected to be purchased with one another. The other big one includes all the rest. Main clusters are designated by color.
I found one containing the three entries for Baroness, Municipal Waste and Napalm Death, very different bands. I’m truly not sure why those three would be in a cluster together (is the cluster is based on lonliness in the network?).
Anyway, I’m done, but glad I got any results at all. I’ll let readers (especially metal fans!) interpret the results.
I had one of those odd old man moments today where I’m watching a squirrel run up a tree. It goes half way up the tree in a split second, stops, then decides there’s nothing to run from after all. It then spends the next 10 seconds trying to get down. In short, the squirrel can climb a tree in a tenth the time it takes to get down. I realize this is a pretty silly observation.
Humans, too, are really good at running up hills, but terrible at getting down them. I remember climbing Mt. Mulanje in Malawi once. Going up was no problem at all. Getting down was dangerous as hell.
We pull better than we push, see right in front of ourselves better than beside ourselves, and have an easier time thinking of the concerns of a few proximal people, than a vast numbers of people who live far away. The latter, obviously, has important implications for global policy.
All of these things, though, are remnants of our evolutionary past and make complete sense when put in the context of our humble, though dangerous, beginnings. Arising in the savannahs of Kenya, humans would have been easy prey for all sorts of predators. When faced with a lion or hyena, a reasonable strategy is to run up the nearest tree and wait for the threat to pass. Thus, getting up the tree is critical for survival, particularly for children. Importantly, if they are eaten before they reproduce, the survival of the species is in question. Better climbers are survivors who are able to pass their climbing abilities on to their own children.
Getting down from the tree, of course, is not critical to survival. Thus, we can take our sweet time clumsily trying to get down, live and be able to pass our clumsy genes on to our children. So threats create effective adaptations and the lack of threat creates useless ones. The same is true for eyesight. Humans, as predatory omnivores, benefit from being able to focus on their prey while hunting, especially when they have the unique ability to run long distances while they wait for their prey (which likely has a serious head start) to tire out.
The Kericho region of Kenya is famous for producing long distance runners. I wonder if they maintained a particular hunting strategy that the Europeans or Asians no longer required.
Of interest to me is why humans might be so clan centric. It has been shown that humans are able to feel empathy for individuals close to them, but have a hard time imagining the sufferings of millions of unfamiliar people. This limitation, of course, allows us to wage wars far from home, and maintain indifference toward the millions living in poverty around the world.
Again, there are evolutionary roots here. Humans, being pack animals are adapted to be concerned about their immediately family and pack members, particularly children. This is important to survival. When any member of the group is threatened, all must be ready to ward off the threat, and protect children, who pass on similar traits to their children. A group of people indifferent to those aorund them would die out quickly. We are poor fighters on our own.
We have lived only in small groups until very recently. Thus, we never formed a need to be concerned with anyone else besides those closest to us. This state of having to care about the welfare of millions (or billions) is entirely new. We haven’t yet adjusted to it, though we make noble attempts. It is possible that we may never fully develop the ability to feel the pain of billions, unless something comes along and starts wiping out those who don’t. If that happened, we’d probably all be dead, though.
I had never thought of the problems of global policy in terms of evolutionary behavior. I guess, I have the squirrel to thank.
First, there is no such thing as a “Monsanto Protection Act” anymore than there is any such thing as “Obamacare.” This is a term created by the item’s opponents to rile up opposition, rather than foster critical analysis. I think that Liberals should be well aware of the political problems associated with demonizing and reductionist labeling of things they don’t like.
Second, though Presidents can veto any bill that comes across his desk, the veto of appropriations bills are rare, and have often been overridden by Congress in the past. It may be a shock to liberals, but Presidents aren’t kings. Conservatives often don’t seem to understand the three branches of Government. Liberals often appear to understand it even less.
Third, there was hardly “no debate.” A Google search will reveal that discussions of this particular item go back at least to June of 2012 and the “Famer’s Assurance Provision” as it is correctly known is part of another Ag Appropriations bill which passed last year. Anyone who tells you this is new, is either lying, or doesn’t know what they are talking about. (Even Snopes took this on.)
Fourth, there is no evidence (that I’m aware of) that GMO’s, which are already in our food supply, are having deleterious effects on human health or the environment. There have been some studies on mouse models that I know of, but it appears that no one can really agree on what a “GMO” really is. Until we can nail that down, and have more informed discussion of which GMOs are “bad” and which are “good”, I don’t think that screaming about GMO’s is any more productive than poorly informed discussion of complex issues such as climate change.
I’m not trying to suggest that there are no effects of “GMOs” whatever they may be. I am saying that lefties are accepting that there are broad effects without question and are relying on less-than-scientific and politically motivated sources such as Salon and the Huffington Post to inform them. That’s a very, very dangerous position to take.
Fifth, I think we should all know by now that rightists use issues like this to weaken Democratic Presidencies. I was of the opinion that much of the furor over controversial portions of the 2012 NDAA bill was stoked by right wingers hoping for a Achilles heel in the 2012 Obama campaign. When we buy into this type of sensationalist reporting without examining the evidence, we play right into their hands.
Sixth, well, I had a sixth, but lost it. But back to GMO’s: It’s interesting that discussions of GMO’s in Sub-Saharan Africa are opposite of what we hear in the US. People view the American and European opposition to GMOs, some of which have the potential to increase food yield while minimizing inputs, as an infringement on developing countries’ rights of self determination. It’s easy to dismiss their concerns as uninformed. However, people and policy makers in developing countries face competing issues of immediate economic needs and broad environmental concerns. Lots of things seem obvious to us, but then we have most of our basic needs already met.
I mean this not as a defense of the Farmer’s Assurance Provision or anything else having to do with GMO’s (so chill out). The endless (and perhaps deserved) vilification of Monsanto has reached a point where examination of the facts is secondary to screaming like a blithering idiot. To me, this is dangerous. When we reduce ourselves to merely accepting positions without criticism, we allow ourselves to be manipulated by just about anything. Not everyone has the time to read all that is required to create a truly informed and reasoned opinion on all subjects, I realize. Striving toward obtaining as much information as is reasonable, however, and acting critically should be a priority for everyone, however.
Liberals are the smart ones. We can do better.
I’ve written before on the link between unrest in South Africa and the problem of rising food prices. Looking at the plot of the right, it’s not hard to notice the similarities in the series of conflict events post 2005 to food prices as estimated by the FAO’s Food Price Index (FPI).
I began to wonder whether some of the recent rise in conflict events is somehow related to rising food commodity prices. Having found a correlation in South Africa, it’s not out of the realm of possibility.
I calculated the cross correlations between the FPI and conflict events and found that the FPI was predictive of conflict, but that conflict was not predictive of FPI. This was similar to what I found in South Africa.
Plotting the FPI against the number of monthly conflict events, I found something interesting. It appears that the two are mostly unrelated until the FPI reaches a threshold of approximately 200, then the number of monthly events shoots up. It is interesting to note that in other research, 210 was the assumed maximum price that households would absorb before taking to the streets.
I’ve repeatedly written on the problem of stock market speculation in food commodities as a cause for rising volatility in world food prices. I won’t beat this into the ground again. However, results such as these indicate that the problem of rising and volatile food prices is not just an economic problem, but also a problem of human health and welfare.
Lake Victoria is a rich source of Nile Perch and Tilapia. Both fish are recent introductions to the lake. The Nile Perch, as a top predator, is associated with extensive ecological damage to the Lake’s ecosystem. Extensive fishing of the Nile Perch has led to a decrease in size, and the comeback of several types of local fish fauna.
Local fisherman on hand made boats use crudely fabricated nets to pull a few fish out of the water, they then sell either whole fish or smoked chunks to dealers. Dealers in turn sell the fish to processors, who then sell the fish to European, American and Japanese distributors. The distributors sell the fish to large supermarkets, who, of course, sell the fish to you and me.
Where the fish may bring as much as $20 a kilo in giants such as Whole Foods, a local fisherman can expect approximately $1.00, but the price is set by the world market and also subject to the whims of dealers. Without a union, fishermen have little means to negotiate prices.
As the lure of quick and plentiful cash is hard to resist, local fisherman have abandoned traditional fishing practices to enter the cash economy. This, of course, in itself is not a bad thing, but the money often gets spent on alcohol and prostitutes, rather than school and health fees for children. The nutritional profile of Lake communities suffers, and children are malnourished in an area that brings nearly $500 million dollars in revenue to Kenya.
Worse yet, ready cash creates a new market for sex work and positions are easily filled by poor women from the rural areas with no other options. The result is that the fish trade, and its destabilizing effect on families, is fueling HIV transmission here. Up 40% of people in any community along Lake Victoria may be HIV positive.
The trade has brought people from the inland areas to Lake Victoria, which has led to displacement of indigenous populations. Displacement has serious implications for security and livelihoods but in this area of intense malaria transmission, displacement and encroachment both impacts human health. The movement of populations has changed the genetic profile of local communities. Millennia of interactions between locals and parasite had led to at least some minimal level of genetic balance, which may have been disrupted by the introduction of new humans not acclimated to local strains of the parasite which causes malaria. This present added risks of serious disease.
Now, anyone who reads this blog knows that I am pro-economic development, pro-market and see no merit in suggesting that developing countries uselessly stick to old, antiquated and oppressive ways. No matter how nostalgic we may be for an idyllic past that may or may not have ever existed, the reality is that economic development in many cultural contexts has extended human life expectancy, reduced infant mortality, freed women to not be treated as cattle and reduced the subjugation of social minorities. But being pro-development means that one must support, err, development, which is only occurring slowly here.
The fishing communities suffer for a number of macro level factors.
- The nature of global economic disparities means that the government cannot step in and help negotiate fair prices for fish. The producers live entirely at the mercy of the market. The government would probably not be successful in artificially raising prices, but could help reduce price volatility by negotiating a yearly floor.
- There is no reliable means of taxing earnings to make sure that money is invested in schools and infrastructure (instead of alcohol). Say what one will about taxation, but the truth is that without it, power lines and roads don’t get built.
- The economy here is insufficiently diversified. The entire economy relies on fish, that developed countries may or may not buy. There is sadly little agriculture here, almost no tourism and, like just about all African countries, no manufacturing. A concentrated economy like that along Lake Victoria, could easily bust overnight.
All of these things, however, are challenges that all developing countries are facing. The economy along Lake Victoria is hardly an exception, but the mechanism are at least somewhat more obvious.
Called “hearsay ethnography,” it makes ethnographers out of non-professional folks who are already embedded within the community. To date, it has been used in understanding the cultural understanding of HIV in Malawi.
We are turning local young people into anthropologists.
Through this technique, we can minimize the observer effect, i.e. the problem of influencing the data collection environment by being the odd, linguistically challenged white people of ambiguous intent. The writers have to write in English, in a manner assumed to be understood by educated folks, which presents problems of its own, but it’s a somewhat more flexible methodology.
It’s a valuable tool for medical anthropology. Through this study, we hope to begin to understand how people in this area conceptualize malaria, malaria treatment and health delivery.
I hired these guys last May, the money ran out, and I thought that the project was just a bust. To my surprise and delight, the data collectors are still writing in their journals and I was finally able to see the results.
Here’s a sample:
I attended the funeral of a child below five years old at Kamyeri. There were so many people who attended irrespective of their age or gender. The discussion about malaria broke out when the child’s father was narrating the cause of her death. He said that many people may think that his daughter had been bewitched but according to him, her death was as a result of his wife’s negligence.
He went on saying that he wasn’t at home when he received the news about her daughter’s illness. He told his wife to take the child to the hospital. However, he arrived home after two days to find out that the child had not been taken to hospital and have not received any kind of medication. He rushed her to the hospital but it was too late because the child died dew hours after the doctor had confirmed that she had serious malaria.
He went on saying if she would have diagnosed early enough, maybe she could have not died.
He added that before someone make or jump to any conclusions about the cause of any illness, he/she should go to the hospital and get tested in order to know the real cause of a disease he/she must be suffering from.
Then an old woman who was just in front of me said that she had informed the child’s mother to take to her the child so that she could treat her through “frito” and “suro.” ”Frito” means a method in which powder traditional herbs are administered to a patient through snifting, while “suro” means a method in which herbs in a powdered form is put on small cuts made using a knife. However, the woman did not turn up instead she went to a preacher to seek divine healing.
The old woman continued saying that the shivering and headache could have been treated using traditional herbs.
I’m in a development mood right now, having had a conversation with someone over whether the American democratic model is portable to other cultures. Let me ramble on about democracy and development for a while.
I say yes, with caveats, of course. There are certainly things about American style democracy that are peculiarly American. Our intense emphasis on property rights being the main candidate. Outside of that, I can see no reason why the American model isn’t transferrable elsewhere, and would even argue that an American (or western style) democracy is not peculiarly Western, but rather a natural outcome of economic growth.
Benjamin Friedman, a Harvard economist, writes in “The Moral Consequences of Economic Growth“:
Economic growth—meaning a rising standard of living for the clear majority of citizens—more often than not fosters greater opportunity, tolerance of diversity, social mobility, commitment to fairness, and dedication to democracy. Ever since the Enlightenment, Western thinking has regarded each of these tendencies positively, and in explicitly moral terms.
I tend to agree with this. Persons who participate in an economy also participate within a system that requires them to step outside their small circles of family and friends. They are forced to rely not merely on one another, but rather must negotiate and interact with persons they may not know, and may not even like. Old hierarchies become meaningless, as the nature of jobs and value become fluid. A King may be necessary today, but useless tomorrow. Most salient, violence and force, which are both wholly un-democratic, become less attractive when one has something to lose.
Interestingly, one researcher has found the same result, that GDP leads to democracy, but that these effects were weaker than that of primary education:
Over the last two centuries, many countries experienced regime transitions toward democracy. We document this democratic transition over a long time horizon. We use historical time series of income, education and democracy levels from 1870 to 2000 to explore the economic factors associated with rising levels of democracy. We nd that primary schooling, and to a weaker extent per capita income levels, are strong determinants of the quality of political institutions. We find little evidence of causality running the other way, from democracy to income or education.
The interesting piece here is that, in most contexts, primary education is a state-provided service. Thus, using public funds (socialism!) to allow near universal education can actually enable the creation of democratic states. I would argue here, that the authors are taking a narrow view. I believe, though cannot test it, that it is not education, but rather women’s education that creates democratic states.
The development – democracy theory, however, can be countered when one considers mostly undeveloped India. India has a GDP lower than that of Ghana and Papua New Guinea, but is a functioning republic, with disparate, linguistically diverse and culturally heterogeneous states that don’t kill one another after elections. Amartya Sen, an Indian economist, is a devoted believer in democracy as a universal and essential system:
India, of course, was one of the major battlegrounds of this debate. In denying Indians independence, the British expressed anxiety over the Indians’ ability to govern themselves. India was indeed in some disarray in 1947, the year it became independent. It had an untried government, an undigested partition, and unclear political alignments, combined with widespread communal violence and social disorder. It was hard to have faith in the future of a united and democratic India. [End Page 5] And yet, half a century later, we find a democracy that has, taking the rough with the smooth, worked remarkably well. Political differences have been largely tackled within the constitutional guidelines, and governments have risen and fallen according to electoral and parliamentary rules. An ungainly, unlikely, inelegant combination of differences, India nonetheless survives and functions remarkably well as a political unit with a democratic system. Indeed, it is held together by its working democracy.