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On the occasion of the centenary of Jan Tinbergen's birth (1903), the 
Erasmus University Rotterdam (formerly Netherlands  School of Economics) 
restored a circulatory tube machine capable of tracing the usual 
macro-economic  flows. I do not recall that it could do Phillips Curve 
simulations, so it might be a different machine than the one mentioned by 
Robert Leeson. Peter Cornelisse (maybe the last Tinbergian in what has 
primarily become a centre-right institution) gave me a full demonstration 
when I visited him last summer. According to him, there are only two others 
in the world. Blueprints were, incidentally, lacking, which made the 
restoration difficult. 
 
Jesse Vorst 
 
 
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