So, Yanis Varoufakis worked with Valve 3 years ago

Well valves econmy is going very good

Luckily? Good to know people are still gullible as ever.

He was fired or he left or temporally left to be on his party and government jobs???

Why that makes you happy? Based on his work on valve? On the government? As a showman? You didn't like his last book?

I doubt the reason are his knowledge and analysis capacity.

In fact he is a great economist but he's not cut out for Mr. Schäuble's little pet like Jeroen. :p

Would be good to say your profession or studies that credit you to say that.

I'm Economist and I can tell you the problem in Europe is he has more knowledge than the rest of the Ecofin altogether.
And same can be said on other organisms full of puppets who don't represent the interests of the citizens.

After reading some of the content on that blog I can only be sad there are just four entries.

After his starts in maths and statistics and movement to economics (based on the blog entry) add even more value to the words he has wrote, something that can be easy to understand but with strong background with which I agree completely and I can call gold:

"Escaping ‘computerised astrology’ – Valve’s allure

For the first time since I switched from mathematical statistics to economics (around 1982), I saw an opportunity for scientific research on some really existing (albeit digital) economy. For let’s face it: Econometrics is a travesty! While its heavy reliance on statistics often confuses us into believing that it is a form of applied statistics, in reality it resembles computerised astrology: a form of hocus pocus that seeks to improve its image by incorporating proper science’s methods, displays and processes. Is this not too harsh a judgment on econometrics?

Not in the slightest. Econometrics purports to test economic theories by statistical means. And yet what it ends up testing is whether some ‘reduced form’, an equation (or system of equations), that is consistent with one’s theory, is also consistent with the data. The problem of course is that the ‘reduced form’ under test can be shown to be consistent with an infinity of competing theories. Thus, econometrics can only pretend to discriminate between mutually contradictory theories. All it does is to discover empirical regularities lacking any causal meaning. To put it bluntly, it is impossible to avoid absurd conclusions such as “Christmas is explained by a prior increase in the demand for toys”. And when we do (avoid them), it is only by accident (or because of a good hunch), as opposed to scientific rigour.

And the reason for this unavoidable failure? None other than our inability to run experiments on a macroeconomy such as rewinding time to, say, 1932, in order to see whether the US would have rebounded without the New Deal (or to 2009 to see what would have happened to the US economy without Ben Bernanke’s Quantitative Easing). Even at the level of the microeconomy, keeping faith with the ceteris paribus assumption (i.e. keeping all other things equal in order to measure, e.g., the relationship between the price of and the demand for milk) is impossible (as opposed to just hard).

In sharp contrast to our incapacity to perform truly scientific tests in ‘normal’ economic settings, Valve’s digital economies are a marvelous test-bed for meaningful experimentation. Not only do we have a full-information set (making sampling superfluous) but, more importantly, we can change the economy’s underlying values, rules and settings, and then sit back to observe how the community responds, how relative prices change, the new behavioural patterns that evolve. An economist’s paradise indeed…"

But why?

In fact that the way debt-trading works....on the start everyone in the chain earns money by selling the claim, price is rising and rising
...at some point , by an impact or over time, the price is falling.
But there is one difference, if you have really stinky cards that nobody wants.....in card-trading there is no community-council that forces someone else to buy your cards (aka tax-payers). (And to be clear, this is valid for all stinky bonds, from greek ancientbonds, icland-glacier-bonds, us-woodhouse-bonds, and many many more)