简介：economics made simple

原站：http://www.the-idea-shop.com/

标签：shop idea

“The Idea Shop”的内容更新

累计：33 篇（自 2008-01-14 起）

更新：约8篇/年，最后更新174 天前

The Idea Shop

Course Materials for UCSD's Economics Ph.D. Program

ever wonder what the first year of an economics ph.d. program looks like? now you can see for yourself here:http://the-idea-shop.com/coursework/the directory above contains scanned pdfs of about 2,000 pages of notes, problem sets and exams from the first year of the ph.d. program at the university of california, san diego from 2010. i've also include... (174 天前)

http://inezha.com/w/sdouivw

The Idea Shop

An Easy Derivation of the Volume of Spheres Formula

working 2,000 years before the development of calculus, the greek mathematician archimedes worked out a simple formula for the volume of a sphere: of his many mathematical contributions, archimedes was most proud of this result, even going so far as to ask that a diagram of a cylinder circumscribed in a sphere -- the method he used to work out the fo... (311 天前)

http://inezha.com/w/whgv1v1

The Idea Shop

A Simpler Proof of the Bolzano-Weierstrass Theorem

a while back i posted a long proof of the bolzano-weierstrass theorem, which basically says every sequence that's bounded has a subsequence within it that converges. here's a much shorter and simpler version of it. first we'll prove a lemma that shows for any sequence we can always find a monotone subsequence -- that is, a subsequence that's always inc... (311 天前)

http://inezha.com/w/lbq37vk

The Idea Shop

New Study of the Kerry-Lieberman "American Power Act

we've released our latest study today. the paper explores the economic and distributional impact of the "american power act" or kerry-lieberman cap-and-trade bill. the study is pretty comprehensive, covering several theoretical issues raised by the bill as well as providing new distributional estimates of the bill's cost by income, age group, region and ... (311 天前)

http://inezha.com/w/kqol6v3

The Idea Shop

The Linear Algebra View of Calculus: Taking a Deriva

most people think of linear algebra as a tool for solving systems of linear equations. while it definitely helps with that, the theory of linear algebra is actually much deeper than simply a mechanism to help solve equations. in this post i'll explain a powerful and surprising application of linear algebra to another field of mathematics -- calculus. i... (311 天前)

http://inezha.com/w/d0gylvg

The Idea Shop

A Simple Way of Solving Exact Ordinary Differential

exact differential equations are interesting and easy to solve. but you wouldn't know it from the way they're taught in most textbooks. many authors stumble through pages of algebra trying to explain the method, leaving students baffled.thankfully, there's an easier way to understand exact differential equations. years ago, i tried to come up with the ... (311 天前)

http://inezha.com/w/ijqz5vb

The Idea Shop

A More Elegant View of the Correlation Coefficient

one of the first things students learn in statistics is the "correlation coefficient" r, which measures the strength of the relationship between two variables. the formula given in most textbooks is something like the following:where x and y are the data sets we're trying to measure the correlation of.this formula can be useful, but also has some m... (311 天前)

http://inezha.com/w/v6o9iuz

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