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Amartya Sen asks: “How was it possible, it has to be asked, for the basic Keynesian insights and analyses to be so badly lost in the making of European economic policies that imposed austerity?” (See intro)
The basic Keynesian insight is, of course, for all immediate practical purposes correct. Nevertheless, Keynes's employment theory is indeed not general and misses a crucial point (2015; 2012).
The most elementary version of the correct Employment Law is shown on Wikimedia AXEC62:
• An increase in the expenditure ratio ρE leads to higher employment. An expenditure ratio ρE>1 indicates credit expansion, a ratio ρE<1 indicates credit contraction or debt repayment.
• Increasing investment expenditures I exert a positive influence on employment, a slowdown of growth does the opposite.
• An increase of the factor cost ratio ρF leads to higher employment. This implies that a higher wage rate W leads to higher employment. This is, of course, contrary to conventional economic wisdom.
Conventional economic wisdom is, we know this from Keynes, wrong. Here is not the place for formal proof but the actual graphics from Nick Bunker's post Waiting for healthy U.S. wage growth give intuitive empirical support.
The correct employment theory tells us that Greece has not only been poisoned but in addition hanged and shot.
In the old days, economics has been called the dismal science. It has now become the lethal science.
Kakarot-Handtke, E. (2012). Keynes’s Employment Function and the Gratuitous Phillips Curve Disaster. SSRN Working Paper Series, 2130421: 1–19. URL
Kakarot-Handtke, E. (2015). Essentials of Constructive Heterodoxy: Employment. SSRN Working Paper Series, 2576867: 1–11. URL