blog de notas de juan freire

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In my opinion, macroeconomics has lost its way. The kind of models that many people use—general equilibrium models—start from assumptions of perfect competition, omniscient consumers, and various like things which give rise to an efficient economy. As far as I know, there has never been an economy that actually looked like that—it’s an intellectual construct. But many people claim that the outcomes of that economy are natural outcomes. When you say “natural,” you already have an emotionally laden term. Deviations from the “natural”—say, like, minimum wage laws, or unions, or governments that give food stamps, or earned income tax credits—are interferences with the natural order and are therefore “unnatural.”

A parallel notion within the field is that our goal as economists is to maximize efficiency; we should leave all the other things to other people. Now, when you take the theory of efficiency, it turns out that there are an infinite number of efficient equilibria, each corresponding to a different distribution of income. Equity and efficiency are different kinds of things.

What’s Natural? Peter Temin in Conversation with The Straddler

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Oct 21
A Writing Revolution § Seed Magazine
Number of authors who published in each year for various media since 1400 by century (left) and by year (right). Our prediction for the imminent future appears as the extrapolation of the Twitter-author curve (dashed line). The horizontal scale of time has one grid line per century (left) or per year (right). The first blog appeared in 1997; Facebook was launched in 2004; Twitter, in 2006. Note that the colored curves on the right have roughly the same steepness as the black curve on the left, despite the hundred-fold increase in the time scale between left and right. This indicates that the new media are growing 100 times faster than books. The book-authors line is not really broken; it’s still growing at the same old rate, tenfold per century, but looks flat when plotted by year. The vertical scale is number of authors per year, as a count (left) or percent of the world’s population (right). The logarithmic vertical scaling, increasing by powers of 10, displays growth clearly because the same percentage increase is always represented by the same upward shift on the graph. Plotted with this scaling, many growth phenomena, including epidemics, produce straight lines, which are particularly easy to recognize and describe. (Click here for methodology and full list of sources.)

A Writing Revolution § Seed Magazine

Number of authors who published in each year for various media since 1400 by century (left) and by year (right). Our prediction for the imminent future appears as the extrapolation of the Twitter-author curve (dashed line). The horizontal scale of time has one grid line per century (left) or per year (right). The first blog appeared in 1997; Facebook was launched in 2004; Twitter, in 2006. Note that the colored curves on the right have roughly the same steepness as the black curve on the left, despite the hundred-fold increase in the time scale between left and right. This indicates that the new media are growing 100 times faster than books. The book-authors line is not really broken; it’s still growing at the same old rate, tenfold per century, but looks flat when plotted by year. The vertical scale is number of authors per year, as a count (left) or percent of the world’s population (right). The logarithmic vertical scaling, increasing by powers of 10, displays growth clearly because the same percentage increase is always represented by the same upward shift on the graph. Plotted with this scaling, many growth phenomena, including epidemics, produce straight lines, which are particularly easy to recognize and describe. (Click here for methodology and full list of sources.)


Ago 7
Spotted on the tumblog of photographer Clayton Cubitt, a collection of more than 700 black and white photographs taken in the Democratic Republic of the Congo in the early 20th century…
(via  Anthropological images from the Belgian Congo, ca. 1900 - Boing Boing)

Spotted on the tumblog of photographer Clayton Cubitt, a collection of more than 700 black and white photographs taken in the Democratic Republic of the Congo in the early 20th century…

(via Anthropological images from the Belgian Congo, ca. 1900 - Boing Boing)


Jul 25