Overweight & Obesity

Fighting obesity—could it be as plain as dirt?

It costs the global economy an estimated US$2 trillion annually and has been dubbed a modern day health epidemic, but new research from the University of South Australia has unearthed a possible cure for obesity—and it ...

Health

Five ways to deal with burnout using lessons from elite sport

It is estimated that burnout costs the global economy £255 billion a year. Burnout tends to happen as a result of long-term stress in a situation or job that, for whatever reason, you're highly committed to. So the more ...

Overweight & Obesity

Nearly 30% of world population is overweight: study

More than 2.1 billion people globally—or nearly 30 percent of the world's population—are now overweight or obese, with the figure set to rise further by 2030, according to a study published Thursday.

Health

7-a-day for happiness and mental health

Happiness and mental health are highest among people who eat seven portions of fruit and vegetables a day, according to a new report.

Health

Population aging will have long-term implications for economy

The aging of the U.S. population will have broad economic consequences for the country, particularly for federal programs that support the elderly, and its long-term effects on all generations will be mediated by how—and ...

Cardiology

Don't cut lifesaving ICDs during financial crisis, ESC warns

Implantable devices for treating cardiac arrhythmias, which include ICDs, are already underused in parts of Eastern and Central Europe and there is a risk that the financial crisis could exacerbate the problem. The European ...

Psychology & Psychiatry

APA task force report outlines actions to end discrimination

Teaching students of all ages about the value of diversity and the serious mental health impacts of bias and stereotyping will help end widespread discrimination in the United States, according to a new American Psychological ...

Health

UN: Deaths up from cancer, diabetes, heart disease

(AP) -- Nearly two-thirds of deaths in the world are caused by noncommunicable diseases such as cancer, diabetes and heart and lung disease which are rapidly increasing at a cost to the global economy of trillions of dollars, ...

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World economy

The world economy can be evaluated in various ways, depending on the model used, and this valuation can then be represented in various ways (for example, in 2006 US dollars). It is inseparable from the geography and ecology of Earth, and is therefore somewhat of a misnomer, since, while definitions and representations of the "world economy" vary widely, they must at a minimum exclude any consideration of resources or value based outside of the Earth. For example, while attempts could be made to calculate the value of currently unexploited mining opportunities in unclaimed territory in Antarctica, the same opportunities on Mars would not be considered a part of the world economy – even if currently exploited in some way – and could be considered of latent value only in the same way as uncreated intellectual property, such as a previously unconceived invention.

Beyond the minimum standard of concerning value in production, use, and exchange on the planet Earth, definitions, representations, models, and valuations of the world economy vary widely.

It is common to limit questions of the world economy exclusively to human economic activity, and the world economy is typically judged in monetary terms, even in cases in which there is no efficient market to help valuate certain goods or services, or in cases in which a lack of independent research or government cooperation makes establishing figures difficult. Typical examples are illegal drugs and other black market goods, which by any standard are a part of the world economy, but for which there is by definition no legal market of any kind.

However, even in cases in which there is a clear and efficient market to establish a monetary value, economists do not typically use the current or official exchange rate to translate the monetary units of this market into a single unit for the world economy, since exchange rates typically do not closely reflect worldwide value, for example in cases where the volume or price of transactions is closely regulated by the government. Rather, market valuations in a local currency are typically translated to a single monetary unit using the idea of purchasing power. This is the method used below, which is used for estimating worldwide economic activity in terms of real US dollars. However, the world economy can be evaluated and expressed in many more ways. It is unclear, for example, how many of the world's 6.6 billion people have most of their economic activity reflected in these valuations.

This text uses material from Wikipedia, licensed under CC BY-SA