Consumption (economics)

Consumption is a major concept in economics and is also studied by many other social sciences. Economists are particularly interested in the relationship between consumption and income, as modeled with the consumption function.

Different schools of economists define production and consumption differently. According to mainstream economists, only the final purchase of goods and services by individuals constitutes consumption, while other types of expenditure — in particular, fixed investment, intermediate consumption, and government spending — are placed in separate categories (See consumer choice). Other economists define consumption much more broadly, as the aggregate of all economic activity that does not entail the design, production and marketing of goods and services (e.g. the selection, adoption, use, disposal and recycling of goods and services).

Consumption function

The consumption function is a mathematical function that expresses consumer spending in terms of its determinants, such as income and accumulated wealth.

Khan Academy

Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan with the aim of providing a free, world-class education for anyone, anywhere. The organization produces short lectures in the form of YouTube videos. In addition to micro lectures, the organization's website features practice exercises and tools for educators. All resources are available for free to anyone around the world. The main language of the website is English, but the content is also available in other languages.

History

The founder of the organization, Salman Khan, was born in New Orleans, Louisiana, United States to immigrant parents from Bangladesh and India. After earning three degrees from the Massachusetts Institute of Technology (a BS in mathematics, a BS in electrical engineering and computer science, and an MEng in electrical engineering and computer science), he pursued an MBA from Harvard Business School.

In late 2004, Khan began tutoring his cousin Nadia who needed help with math using Yahoo!'s Doodle notepad.When other relatives and friends sought similar help, he decided that it would be more practical to distribute the tutorials on YouTube. The videos' popularity and the testimonials of appreciative students prompted Khan to quit his job in finance as a hedge fund analyst at Connective Capital Management in 2009, and focus on the tutorials (then released under the moniker "Khan Academy") full-time.

Turn on the Bright Lights

Turn On the Bright Lights is the debut studio album by the American rock band Interpol, released in August 2002. The album was recorded in November 2001 at Tarquin Studios in Connecticut, and was co-produced, mixed and engineered by Peter Katis and Gareth Jones. It was released on August 19, 2002 in the United Kingdom and August 20 in the United States, through independent record label Matador Records. Upon release, the record peaked at number 101 on the UK Albums Chart. It reached number 158 on the Billboard 200 in the United States, as well as spending 73 weeks in the Billboard Independent Albums, peaking at number five.

"PDA", "NYC", "Obstacle 1" and "Say Hello to the Angels" were the singles from Turn On the Bright Lights, and a video was shot for each with the exception of "Say Hello to the Angels".

The album was certified Gold by the RIAA on August 29, 2011 for shipments of 500,000 copies.

A remastered version of the album was released in 2012 to commemorate its tenth anniversary. It featured additional material including demo recordings of several tracks, the bonus songs previously available on international releases and a DVD of live performances and music videos.