Are You What You Eat?

Are You What You Eat? Healthy Behaviour and Risk Preferences

I am not strictly a fan of economic experiments. They are useful, but usually researchers achieve conclusions from samples and settings that are far from what happens really in population and geographies. However, some days ago I was looking at an article that it seemed of interest. They try to:

estimate the degree of risk aversion for a sample of young healthy adults and we explore its links with a broad range of risky behaviours considered together. Second, as indicator of the overall quality of diet, we complement, for the first time, the BMI with the Healthy Eating Index (HEI), and we relate both to estimated risk preferences

Sounds good, because the use of Body Mass Index is absolutely outdated and its relationship with risk aversion is crucial. This is the summary:

Our results show that risk preferences significantly differ across young adults with different, not extreme, health conditions. In particular, they reinstate the importance of conducting analyses that look separately at the two sub-samples of female and male subjects . This allows disentangling the links and interactions between preferences and key health variables such as smoking, and also to fully account for the gender-specific effects of the BMI and of alternative indicators of healthy weight.

Second, in our sample young women do not show any significant robust associations between risk preferences and BMI. Third, for young men – but not women – the HEI index appears to be significantly and consistently associated with risk preferences: across all specifications, healthier nutritional habits, tend to be robustly associated with higher risk aversion. This, together with the lack of significance of BMI-based indexes, suggests that, for subjects with not extreme health conditions, there is a wide scope to use measures alternative (or complementary) to the BMI, as indicators of the overall quality of diet.

That's it. And his final recommendation:

 From a health policy perspective, our study suggests that in young adults who have not yet developed chronic or extreme health conditions, looking at a comprehensive nutritional indicator such as the HEI could provide more direct insights to the deeply rooted behavioural mechanisms that drive health behaviours than considering an indirect and increasingly questioned measure such as the BMI.

Since children's obesity is one of the main challenges for health improvement, someone should take into account this message.

PS. Eliciting risk and time preference, the 2008 key article.

 Nancy Vieira

Approaching the golden age of epigenomics and epitranscriptomics

A new twist on epigenetics

If epigenomics is crucial to discard the genetic predestination paradigm, now we can add a new 'omics to the paradigm: epitranscriptomics. Last February, Nature published interesting news related to recent scientific developments:

The epigenome helps to explain how cells with identical DNA can develop into the multitude of specialized types that make up different tissues. The marks help cells in the heart, for example, maintain their identity and not turn into neurons or fat cells. Misplaced epigenetic marks are often found in cancerous cells.

 Chuan He and Tao Pan are two researchers that have been working on new ways of controlling gene expression

He and others have shown that a methyl group attached to adenine, one of the four bases in RNA, has crucial roles in cell differentiation, and may contribute to cancer, obesity and more. In 2015, He’s lab and two other teams uncovered the same chemical mark on adenine bases in DNA (methyl marks had previously been found only on cytosine), suggesting that the epigenome may be even richer than previously imagined.

The team had shown for the first time that RNA methylation was reversible, just like the marks found on DNA and histones.

Methylated adenine bases are the focus of research on gene expression.

Exercise as a socially contagious activity

Exercise contagion in a global social network

Disciplines as diverse as economics, sociology, medicine, computer science, political science and physics have recently become interested in the interdependence of behaviours across the human social network. In particular, scientists have begun to ask whether our health and other behaviours are contagious, in that our decisions and actions affect the decisions and actions of our peers. If behavioural contagions exist, understanding how, when and to what extent they manifest in different behaviours will enable us to transition from independent intervention strategies to more effective interdependent interventions that incorporate individuals’ social contexts into their treatments

A new  study offers some of the first hard evidence that health-related habits can spread — and so perhaps could be deliberately seeded and encouraged — by social influence and peer pressure. Previous research has sought such a contagious effect in factors such as obesity and smoking, but the results have been inconclusive.

Studies in social differences in health have a a new hurdle to tackle. How to boost social permeability? As Mackenback said in The Lancet on health inequalities: now it's personal.

PS. These are the results of the study in one figure:

A much-needed start: soda tax

Soda Politics: Taking on Big Soda (and Winning)

Obesity is a top concern on public health. Personal and collective responsibilities are linked. The concrete issue is the following one: government may require manufacturers to release information to consumers (about calories, composition, etc.), but is there anything else that he can do?
Current strategies fall short to achieve the goals of obesity reduction. Nutritional labels are not enough, are taxes an option?. Some countries have already implemented taxes on fizzy drinks, fat or salty foods. There are complex technical issues to be considered. However, The Economist says that taxes on fizzy drinks seems to work as intended. If this is really so, then there is a much-needed reason to start in this way.
Marion Nestle in her latest book "Soda Politics" provides the hole list of arguments. Any regulator should read in detail the book, specially part IX on "Advocacy: Soda caps, taxes and more", and take into account her recommendation:

 Let me acknowledge immediately that advocacy to reduce soda intake faces special challenges that distinguish it from advocacy for reduction of alcohol, tobacco, or junk foods. Like these other industries, the soda industry sells relatively inexpensive products that are available in almost every corner of the globe. Like them, this industry is extremely wealthy. Also like the others, health is the industry’s Achilles’ heel. But in sharp contrast to companies selling junk food, alcohol, or tobacco, Coca-Cola and PepsiCo consistently rank among the most admired, respected, and honored companies in the world. Health and environmental advocates must recognize the power of this favorable public perception when encouraging others to resist it.

PS. A must read. Understanding 25 years of health policy in Catalonia, released in this journal: Referent. You'll find an article that I have written for the occasion.

Tackling obesity: the toolbox

Patchy progress on obesity prevention: emerging examples, entrenched barriers, and new thinking

World Cancer Research Fund International NOURISHING framework 
Food policy framework for healthy diets and the prevention of obesity and diet-related non-communicable diseases. 

 Key message:

The problem of obesity must be reframed to acknowledge on one hand that individuals bear some personal responsibility for their health, but that, on the other hand, environmental factors exploit biological, psychological, social, and economic vulnerabilities that promote overconsumption of unhealthy foods. A vicious cycle is created in which the preference and demand for unhealthy products are not only shaped by the environment, but lead to environmental changes that further encourage consumption of unhealthy foods. This cycle makes it difficult for people to act in their own long-term self-interest, but it can be broken with regulatory actions from governments and joint efforts from industry and civil society to create healthier food systems.

Regulating sugar sweetened beverages

Searching for Public Health Law’s Sweet Spot: The Regulation of Sugar-Sweetened Beverages

Nowadays, obesity prevention lies at the heart on any public health policy. If sugar sweetened beverages contribute decisively to obesity, then something should be done. What?. A recent PLOS article explains the options:

The main regulatory approaches are taxes, restrictions on the availability of SSBs in schools, restrictions on advertising and marketing, labeling requirements, and government procurement and benefits standards.

On taxes:

Savvy regulatory design has tremendous potential. For example, there is growing evidence that taxes that are more salient to consumers, such as those included in a good’s posted price (rather than being levied at the register), are more likely to influence purchasing behavior

On public procurement, a practical suggestion for immediate application:

Restrictions on which beverages may be purchased using government funds are a less visible form of regulation, but one with potential to change the consumption patterns of large numbers of people. Outside public schools, these standards are most germane in two areas: procurement standards for public institutions (e.g., government agencies, hospitals, and prisons) and restrictions on what recipients of government benefits for the indigent may buy with those funds.
The UK’s Government Buying Standards prohibit central government bodies from  procuring SSBs larger than 330 ml and encourage the wider public sector to follow the guidelines. Massachusetts  and many US counties and cities have adopted nutrition standards for government contracts, but most apply to a limited set of institutions, such as childcare facilities or youth centers.

PS. My former posts on the same topic.
PS. Article: The impact of sugar sweetened beverages on depression risk in adults.
PS. Report: Scenarios of Macro-economic Development for Catalonia on Horizon 2030
PS. Report: FBBVA Essential Public Services.
PS. Report: Chronicle of a premeditated offensive.

Public Health Priorities

Start Well, Live Better: A Manifesto for the Public’s Health. London: UK Faculty of Public Health, 2014

These are the 12 suggested priorities for public health in UK for the next 5 years:

Give every child a good start in life

• Give all babies the best possible start in life by implementing the recommendations of the 1001 Critical Days cross-party report
• Help children and young people develop essential life skills and make Personal, Social, Health and Economic, and Sex and Relationship Education a statutory duty in all schools

• Promote healthy, active lifestyles in children and young people by reinstating at least 2 h per week of physical activity in all schools

Introduce good laws to prevent bad health and save lives

• Protect our children by stopping the marketing of foods high in sugar, salt and fat before the 9 pm watershed on TV, and tighten the regulations for online marketing
• Introduce a 20% duty on sugar-sweetened beverages as an important measure to tackle obesity and dental
• caries—particularly in children
• Tackle alcohol-related harm by introducing a minimum unit price for alcohol of at least 50 p per unit of alcohol sold
• Save lives through the rapid implementation of standardised tobacco packaging
• Set 20 m.p.h. as the maximum speed limit in built-up areas to cut road deaths and injuries, and reduce inequalities

Help people live healthier lives

• Enable people to achieve a good quality of life, health and wellbeing—give everyone in paid employment and training a ‘living wage’
• Reaffirm commitment to universal healthcare system, free at the point of use, funded by general taxation

Take national action to tackle a global problem

• Invest in public transport and active transport to promote good health, and reduce our impact on climate change
• Implement a cross-national approach to meet climate change targets, including a rapid move to 100% renewables and a zero-carbon energy system

As you can see, many similar things with our PINSAP, the Health Policy Consensus and Health Plan. However, after yesterday news the pending issue of our public health is mainly alcohol abuse. We should focus on what works to reduce alcohol and addictive substance abuse. And first of all, we need to understand the foundations and best approaches to the problem. I would suggest you have a look at this book and specially this one:

PS. Binge drinking 'costing UK taxpayers £4.9bn'  Does anybody know how much does it cost here???

PS. In Spain, publicly funded health expenditure reached 64.150 million € in 2012,the amount for financial system bailout was 101.283 million € (p.24). Don't forget it: these are the priorities.

A call for a political prescription to tackle obesity (2)

Overcoming obesity: An initial economic analysis


Some days ago, I was asking for a clear determination to our politicians to fight against the obesity epidemics. How? The just released McKinsey report provides 44 measures to implement and its potential impact. Have a look at it, and you'll be convinced that all we need is political will, social consensus and individual commitment to overcome this crucial issue.

A call for a political prescription to tackle obesity

A political prescription is needed to treat obesity
Why Nudge?

Unless there is harm to others, the government cannot exercise power over people. This is the John Stuart Mill's "Harm principle", sometimes called the Liberty Principle. And governments have taken as given that individuals always take decisions in a rational way, fulfilling their preferences. As Cass Sunstein says in his last book "Why Nudge?", such a principle "raises serious doubts about many laws and regulations. Sometimes power is exercised over people in large part to promote their own good, finally people are note entirely sovereign over their body and minds". He argues in favour of paternalism in certain circumstances. We have already explained such details formerly in this blog.
Today I would like to suggest a reading to you, an excellent editorial in the Canadian Medical Association Journal. It is a call for action on obesity and specifically on food policy and taxation on sugar-sweetened beverages.

Our current approach to obesity relies on the assumption that people have choices, often fail to make the right ones, and should be educated and helped to make better choices. This view is simplistic and clearly absurd, given the continued rise in the prevalence of obesity in countries that have been tackling the problem for decades. Are millions of people really choosing to be overweight?

People are not as free to choose as we would like to believe. Neurobiological desires for sweet and high-fat foods gave humans a survival advantage in a world where food was scarce and every calorie counted. Where food is inexpensive and easily available, biological processes related to eating can mirror addiction and will lead to our destruction. We need to change our approach. We need incentives beyond educational messages. Strategies that include individual interventions,  school-based nutrition and activity interventions, incentives for active commuting and changes to the built environment should continue; however, we also need robust ways to restrict portion sizes and reduce the sale of sugar-sweetened beverages and other high-calorie, nutrient-poor food products. Our government needs to consider taxation as a tool to combat the consumption of these addictive foods and beverages, just as it regulates the sale of alcohol and tobacco products for the purposes of population health.

In USA, Berkeley is the first city that will intoduce the soda-tax after a recent ballot. Berkeley’s Measure D proposed imposing a 1-cent-per-ounce general tax on sugar-sweetened beverages and sweeteners used to flavor drinks. The measure will not dedicate funding to a specific cause and did not require only a majority of the vote.
I still remember how a similar measure was discarded some years ago in our country. The times to reconsider the introduction of a soda tax are coming.

Healthy and satisfied

Enquesta de salut de Catalunya

Latest data from the 2013 Health Survey shows that 81,1% of the population consider themselves as healthy, slightly better that in 2010 that was 79,3%. Regarding satisfaction, 86,9% of population is satisfied with public health services, again better than 2010 that was 84,7%. Though in 2012 results were a little bit better.
In the details of the results you'll find that obesity and overweight is the biggest issue to address in my opinion. There is still a lot to do on tobacco and alcohol, but data shows some improvement.
This health survey should be broadcast in the media and efforts to promote healthy behaviours should raise. Unfortunately nowadays media is focused on negative messages and this issue lies far from journalists' interests.

The Health of Catalans

La salut de la població de Catalunya en el context europeu

Comparing population health between countries allows to understand the scope of the differences. Some of them are unwarranted and others require an explanation. Anyway, it is good to confirm in a new report that the health of catalans has achieved a top level in Europe. The key indicator is healthy live years. As a summary it works, but when you go into details, then some  problems arise: obesity, tobacco, colon cancer, diabetes,...
Comparing public expenditures , Catalonia spends less than other countries with similar GDP. And the opposite is true for private expenditures (p.16). Unfortunately, data is  from 2010 and things have changed a lot, on GDP and health expenditure. My guess is that right now we are spending publicly a larger percentage than 6%. An update is needed in order to know better our current position.

Health impact of sugar-sweetened beverages taxation

Averting Obesity and Type 2 Diabetes in India through Sugar-Sweetened Beverage Taxation: An Economic-Epidemiologic Modeling Study

Clever politicians want to know the potential welfare impact of taxation. I said "clever", though this is not always the case. An example of economic modeling for sugar-sweetened beverages to set up the right level of taxation (in India), appears in PLOS Medicine. The summary:

The researchers used survey data relating SSB consumption to price variations to calculate how changes in the price of SSBs affect the demand for SSBs (own-price elasticity) and for other beverages (cross-price elasticity) in India. They combined these elasticities and data on SSB sales trends, BMIs, and diabetes incidence (the frequency of new diabetes cases) into a mathematical microsimulation model to estimate the effect of a 20% tax on SSBs on caloric (energy) consumption, glycemic load (an estimate of how much a food or drink raises blood sugar levels after consumption; low glycemic load diets lower diabetes risk), the prevalence of overweight/obesity, and the incidence of diabetes among Indian subpopulations. According to the model, if SSB sales continue to increase at the current rate, compared to no tax, a 20% SSB tax would reduce overweight/obesity across India by 3.0% and the incidence of type 2 diabetes by 1.6% over the period 2014–2023. In absolute figures, a 20% SSB tax would avert 11.2 million cases of overweight/obesity and 400,000 cases of type 2 diabetes between 2014 and 2023. Notably, if SSB sales increase more steeply as predicted by drinks industry marketing models, the tax would avert 15.8 million cases of overweight/obesity and 600,000 cases of diabetes. Finally, the model predicted that the largest relative effect of an SSB tax would be among young men in rural areas.

The results confirm previous studies, 20% may be the ceiling for a tax . But what happens to health?. Assumptions on a fall in consumption, are just that, assumptions. And former behaviour is extrapolated into the future. This is what happens to any model, and this is the uncertainty and courage that any politician must hold in taking a difficult decision. Such moment is closer than before. If you are not convinced, I would suggest you have a look at this documentary released last week:



The documentary is about weight control, but places special emphasis on sugar (addiction). Please have a look at the quantity of sugar in a beverage!!! (14 sugar cubes). Incredible.

PS. "Superbe" post by Reinhardt: How the Medical Establishment Got the Treasury’s Keys

Let's get fit, not fat

Aportaciones de la economía del comportamiento en política sanitaria: Algunas notas en torno al ejemplo de la obesidad
 The influence of obesity and overweight on medical costs: a panel data perspective

In the EJHE you'll find  a clear message:

The results indicate that obesity is associated with substantial healthcare cost increases and there are large differences in costs by degree of obesity. Specifically, severe obesity raises total direct medical costs by an average of 160 € per patient and year. With total medical costs averaging 600 € for normal-weight individuals, this means that severe obesity is associated with an increase in costs of 26 %. The effect of moderate obesity is more modest: it raises medical costs by 97 € or 16 %. Overweight has an even smaller impact, raising costs by 51 € or 8.5 %.

Therefore, if obesity has an economic and health impact, what next?
The EEA article by A. Garcia-Altés reflects current knowledge on behavioral economics and obesity. However there is a long way to go. As I said in a former post we do need a battery of measures to fight obesity: regulatory, social and individual measures.

A healthier population (after all this years)

Enquesta de salut de Catalunya 2012. Informe dels principals resultats 

It is just a fact. The authors of The Lancet article were unable to have a look at the last Catalan Health Survey. In 2006, 78,6% of population considered their health as good, in 2012 (p54) this figure has moved up to 82,8%. The Lancet only emphasized negative issues without clear evidence. It seems that this is the selling argument of our times.
The most relevant thing from the health survey is that citizens view themselves healthier than before the recession, you'll find additional details inside the report.
However, a closer look may highlight some doubts about individual health behaviours, smoking by young people and specially the obesity epidemics. Therefore, a short applause and a clear public health alert for an improvement of health behaviours.

Mounting evidence about sugar-obesity link

Sugar: Consumption at a crossroads

Should the government and health officials do more to reduce consumption of sugar, and will they in your opinion? The answer is yes, 90% of the European population consider that governments need to act,  but only 52% believe the governments will do it, according to the Credit Suisse Equity Research Nutrition Survey, 2013. You'll find the details in this report.
Why so many people consider that right now something should be done about sugar intake?. Basically because everybody is increasingly convinced about the relationship between excessive sugar consumption and obesity.
The report is a good guide for all the implications and potential governmental regulation and industry self-regulation.
Definitely, something should be done, asap.

Tackling obesity

Integrating Educational, Environmental, and Behavioral Economic Strategies May Improve the  Effectiveness of Obesity Interventions

On top of the priorities for the improvement of public health, obesity deserves a place. However, the tools and decisions to slice its impact on health are still dubious. A recent article may help to put together different approaches:

Obesity is a multifactorial problem impacted by access to foods (supply) and food choices (demand). Neighborhood environments constrain the food choices available to individuals, while complex dietary decisions are driven by taste, cost, nutrition, convenience, and weight concerns. The complex nature of dietary choices therefore requires informed educational approaches that are strategically combined with guided nudges, and environmental interventions that improve access to promote healthier eating. Moreover, multi-institutional  collaborations will likely be necessary to address the obesity epidemic.

Since a multi-institutional approach is needed, somebody has to lead this effort. Is the government able to do it?. If so, don't delay it.

PS. Let me suggest also this Lancet article, my key reference up to now with the OECD one and its update.

L'economia del comportament i l'obesitat

Eating Behavior and Obesity Behavioral Economics Strategies for Health Professionals

Sabem que majoritàriament els indicadors de salut dels catalans que empitjoren, tenen relació amb els comportament, amb els hàbits saludables. I que l'obesitat es troba al capdavant.
Entendre què cal fer és crucial. Però malauradament tenim visions i estratègies de curta volada. Ara acaba d'aparèixer un llibre que ofereix noves perspectives tot introduint l'economia del comportament davant el problema de l'obesitat. Diu:

There are two ways of thinking about influencing behavior. The first is based on the standard rational model. That is, infl uencing what people consciously think about by increasing knowledge and awareness (known as the refl ective system ). This aproach assumes that the individual is a rational agent who surveys the situation to see what the various options are and then does a quick cost-benefi t analysis of those options in order to choose. The second approach is to alter the context within which people act (known as the automatic system ). This type of intervention is similar to the “nudge” outlined by Thaler and Sustein (2008), which often involves small changes to the choice environment. For example, one intervention tried to encourage school children to make healthier choices without alienating students by reducing their perceived choices. In a school cafeteria, what kids choose depends on the order in which the items are displayed.

 Els que llegiu aquest blog ja sabeu que m'hi he referit anteriorment en termes genèrics. Però aquest llibre esdevé més interessant perquè mostra amb molta precisió un canvi de perspectiva. Destaco una conclusió del primer capítol:

Rational food decisions often involve trade-off between short-term gains of sensory pleasure and longer term gains of health and wellness. Findings from behavioral economics research suggest that even when people are motivated to make healthy choices, external constraints in the decision-making process can prevent them from choosing optimally. Most of us prefer immediately gratifying short-term pleasure over our long-term goal of eating healthy. Errors in choices arise from systemic decision biases, emotion, and the limits of cognitive capacity.

Atesa la importància de "l'epidèmia" potser caldria que més d'un hi fes una ullada. Encara que també vull anunciar que el capítol d'implicacions per a la política (el 12) és molt fluix. Us caldrà doncs una mica d'imaginació i reescriu-re'l vosaltres mateixos.

 No us perdeu les friky-fotos de Diane Arbus al Jeu de Paume

(suggerit per un lector del blog i que em plau compartir amb valtros)

PS. Les retallades són notícia a la CNN, (confonen Catalunya amb Espanya, treball periodístic de nivell...)

La mesura del benestar

How's life? Measuring well-being

Hem passat tants anys parlant que el PIB no ho recull tot i ara que surt una alternativa li dediquem poca atenció. Ha estat novament l'OCDE qui ha fet l'esforç per a 34 països per tal de determinar el benestar relatiu de la població. Ho trobareu a: How's life? Measuring well-being. De les moltes dimensions, adjunto la relativa a salut aquí sota. La satisfacció amb la vida estaria al 6,2 mentre que a l'OCDE es troba al 6,7 i quan mires algunes dimensions en particular hi ha sorpreses preocupants. Resulta que quan disposàvem només del PIB resultava fàcil pensar unidimensionalment i en canvi quan n'hi ha moltes cal posar un pes a cadascuna, i això depèn de les preferències individuals. Per tant només hi ha una opció possible, fer servir l'eina interactiva i que cadascú es calculi el seu benestar relatiu (l'agregació de preferències és tasca complicada).

Most OECD countries have enjoyed large gains in life expectancy over the past decades, thanks to improvements in living conditions, public health interventions and progress in medical care. In 2008, life expectancy at birth in Spain stood at 81.2 years, two years above the OECD average of 79 years.
Higher life expectancy is generally associated with higher healthcare spending per person, although many other factors have an impact on life expectancy (such as living standards, lifestyles, education and environmental factors). Total health spending accounted for 9.0% of GDP in Spain in 2008, which is equal to the average of OECD countries. In 2008, health spending as a share of GDP was the highest in the United States (which spent 16.0% of its GDP on health), followed by France (11.2%), Switzerland (10.7%), and Germany and Austria (both 10.5%). Spain ranks below the OECD average in terms of health spending per person, with spending of 2,902 USD in 2008, compared with an OECD average of 3,060 USD. Between 2000 and 2008, health spending per person in Spain increased, in real terms, by 4.7 % per year on average, a growth rate higher than the average in OECD countries (4.2%).
Throughout the OECD, tobacco consumption and excessive weight gain remain two important risk factors for many chronic diseases.
Spain has achieved progress in reducing tobacco consumption, with current rates of daily smokers among adults standing at 26.4% in 2006, down from 41% in 1985. However, smoking rates in Spain still remain higher than the OECD average of 23.3% in 2008. Sweden, the United States and Australia provide examples of countries that have achieved remarkable success in reducing tobacco consumption, with current smoking rates among adults below 17%.
Adult obesity rates in Spain are higher than the OECD average, but child rates are amongst the highest in the OECD. Two out of 3 men are overweight and 1 in 6 people are obese in Spain. One in 3 children aged 13 to 14 are overweight. The proportion of adults who are overweight is projected by the OECD to rise a further 10% during the next 10 years. Obesity’s growing prevalence foreshadows increases in the occurrence of health problems (such as diabetes, cardiovascular diseases and asthma), and higher health care costs in the future.
When asked, "How is your health in general?", 70% of people in Spain reported to be in good health, close to the OECD average of 69%. Despite the subjective nature of this question, the answers have been found to be a good predictor of people’s future health care use.

PS. Per aquells que associen desigualtat social amb menys satisfacció en la vida, els convé veure aquest post i el seu argument trontollarà una mica més.

Paternalisme liberal

Obesity and the Economics of Prevention: FIT NOT FAT

En Thaler diu que no és ben bé un oxymoron. En Becker aplana el camí per a Posner.En Posner diu clarament que si.
No és tant important si ho és o no, més aviat el més important és la rellevància per la política sanitària. I aquí és on ens cal reflexionar de veritat. Al llibre Obesity and the Economics of Prevention: FIT NOT FAT hi ha un capítol suggerent sobre el paper dels governs i el mercat. La referència al paternalisme liberal es resumeix aquí:

Preferences may also be influenced in more subtle ways than through the direct provision of information. An important example is what has been described as setting the default option by advocates of “libertarian paternalism” (e.g. Sunstein and Thaler, 2003). The underlying principle is that individual preferences driving an act of choice tend to be influenced by how the default option is configured. An example of the default option is the routine association of a certain side dish to a main course ordered in a restaurant. Customers may be entitled to demand an alternative side dish, but if they did not exercise this faculty they would receive the standard (default) option. Using a healthy option as a default instead of a less healthy one would have a significant effect on the number of customers eventually choosing to consume the healthy option. Actions involving changes in default options may display varying degrees of interference with individual choice and they may be perceived as more or less acceptable by consumers depending on the nature of the choices they aim to influence. For instance, changing the order in which food is arranged in a company cafeteria (Sunstein and Thaler, 2003) in order to steer consumer choices towards healthy options would seem to be a fairly non-intrusive action. However, other actions based on the same basic principle, i.e. changing the default option, may be perceived as much more intrusive. An example is policies making organ donations a default, with individuals being allowed to opt out upon request, have been viewed as most controversial and have been fiercely opposed in many countries, despite evidence which shows these policies may increase organ donations by as much as 25-30% compared to countries where the default is not consenting to donation (Abadie and Gay, 2006).

I el que fan els països OECD en relació a l'obesitat es resumeix en aquesta figura:














Si l'obesitat és considerada com el factor de risc més important, aleshores convé saber què cal fer. El llibre de l'OCDE mostra l'estat de situació però queda molt camí per endavant. Al McKinsey Quarterly ens diuen que els governs han d'actuar.