Employment and Income Distribution from a Classical-Keynesian point of view. Some tools to ground a normative analysis
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1 Employment and Income Distribution from a Classical-Keynesian point of view Some tools to ground a normative analysis Università Cattolica del Sacro Cuore, Milano enricobellino@unicattit Tho Global Crisis Contributions to the Critique of Economic Theory and Policy, Università di Siena, January 26 27, 2010
2 Two unambiguous facts: A rise in the profit share Which profits needs a system?
3 Two unambiguous facts: An increasing financiarization of the economies Is there a necessary degree of finance? It is difficult to find replies in dominant economic theory
4 Wealth/Income distribution Wealth distribution Pure exchange economy y A u B x B x B 0 B ȳ A 0 A CC E ω E ȳ B x A x A ū B 0 E E ū A UF u A y B
5 Wealth/Income Distribution K y Income distribution Production and Exchange economy L x K y L Y f y (K y, L y ) = Y L x f x (K x, L x ) = X isocost slope: ( ) π w K x 0 x K x 0 y Given final quantities, X and Ȳ, income distribution is univocally specified L y
6 An alternative approach Mainstream normative analysis: based on the notion of optimality Alternative approach: the modern Classical approach Sraffa (1960), Garegnani (1983, AER; 1984, OEP), Pasinetti (1981, 2007) normative analysis based on the notion of necessity
7 Analytical framework C final commodities, produced by labour and capital goods; capital goods are produced just by labour (for simplicity); Quantity system: a 1N a 1C 1 T a k1 N 0 1 T C 0 0 a kmn a N1 a NC a Nk 1 a Nk C 0 Q 1 Q C Q k1 Q kc Q N = Q 1 Q C Q k1 Q kc Q N (1)
8 Price system: 0 0 π T 1 0 a N π C + T 1 a CN C a Nk a NkC a 1N a CN (a k1 N π 1 a 1N ) (a kc N π C a CN ) 0 p 1 p C p k1 p kc w = p 1 p C p k1 p kc w (2)
9 Condition to exclude trivial solutions: C C 1 a Nc a cn + a Nkc a cn + T c c=1 c=1 the macro-economic condition; C a Nkc a kc N = 1 (3) it express the Keynesian principle of effective demand at aggregate level; It is not automatically satisfied! it is necessary to take care of it in each period ( institutional problem); Solution for quantities: Q c = a cn QN, c = 1,, C, ( ) Q kc = a kc N + 1 T c a cn QN, c = 1,, C Keynesian principle of effective demand c=1 (4)
10 The price system p c = Necessary prices [ ( ) ] a Nc + π c + 1 T c a Nkc w, c = 1,, C, p kc = a Nkc w, c = 1,, C One distributive variable to be fixed outside system (5) For example: π can be fixed in [0, Π] without jeopardizing reproduction w 1 π 0 Π Profits arise as wages do not absorb the entire net product (and vice versa),, unless we consider a growing system (5)
11 A growing system Population, final demand and technology change: Q N (t) = Q N (0)e gt, (6a) a cn (t) = a cn (0)e rc t, c = 1,, C (6b) a Nc (t) = a Nc (0)e ρc t, c = 1,, C, (6c) a Nkc (t) = a Nkc (0)e ρ kc t, c = 1,, C (6d) This changes solutions (4) and (5) in equilibrium paths; in particular: Q c = a cn (0) Q N (0)e (rc +g)t, c = 1,, C, (7a) ( ) Q kc = g + r c + 1 T c [a cn (0) Q N (0)]e (g+rc )t, c = 1,, C (7b) This permits to define a set of natural rates of profits, π c = π k c = g + r c, c = 1,, C (8) that, if realized, provide each sector the necessary resources to expand according to its potentialities
12 Characteristics of natural configuration Labour theory of value Insert πc = πk c = g + r c in the price equations: { pc = w[a Nc + (1/T c)a Nkc + (g + r c)a Nkc ], c = 1,, C p kc = wa Nkc c = 1,, C (9) Prices are thus entirely determined by labour quantities evident for capital goods; for final good: a Nc, ie the direct labour; (1/T c )a Nkc, ie the indirect labour; (g + r c )a Nkc, ie the hyper-indirect labour
13 Profits as a source of growth In the natural configuration profits are justified insofar as the source for financing investments, not as an income of some class, typically capitalists (a social justification for profits) Capitalists perceive wages for their working activity Natural profits resolve totally into wages: the wages that go to pay the hyper-indirect labour Income is distributed according to labour contributed (labour principle of income distribution) Remember: this is just an ideal configuration
14 Natural rate of interest Macro-economic condition: all revenues must be spent (at aggregate level) Within lifetime single individuals may borrow or lend assets and liabilities (denominated in terms of commodity h) As all prices vary, any debt/credit relation should entail a distortion from the labour principle of income distribution The natural rate of interest re-establishes this principle: i h = ρ h (10) if debts and credit relationships are denominated in h
15 Natural relations (NQ) output levels, identified by equations { Qc = a cn Q N, Q kc = [a kc N + (1/T c ) a cn ] Q N, (Np) relative prices, identified by equations { pc = {a Nc + [π c + (1/T c )] a Nkc }w, p kc = a Nkc w (4) (5) (MC) full employment, entailed by the macro-economic condition anc a cn + (1/T c )a Nkc a cn + a Nkc a kc N = 1; (3) (Nπ) natural rates of profits, identified by equations π c = π = g + rc ; (8) kc (Ni) natural rate of interest, identified by equation i h = ρ h (10)
16 Average natural rate of profit Goal πc = πk c = g + r c is very difficult to be accomplished capitalism tend to uniform the rates of profit; it is defined at a vertically integrated level Apparently the r c s are independent on technical magnitude But overall expenditure is linked to ρ (source of income s growth) Re-arrange the macro-economic condition: ωce (π c g ρc )t + ω kc e (πc g ρ kc )t = 1 (11) It remains satisfied if the ρ m, ρ km are replaced by their average, ρ ωme (π m g ρ )t + ω km e (πm g ρ )t = 1 Assume that condition (11) is satisfied at time, t = 0; then ωm + ω km = 1 It remains satisfied if the π ms are replaced by their average: π = ρ + g
17 π = ρ + g, (12) is that uniform rate of profit that, if realized, would permit to the system as a whole to recruit all financial resources necessary to sustain the growth of each (v i) sector according to its specific rates of growth Financial inflows and outflows among sectors, to replicate the natural outcome: a natural role of finance π 1 = r 1 + g π 2 = r 2 + g π 3 = r 3 + g π 4 = r 4 + g π 5 = r 5 + g π = ρ + g Surplus of sectors 4 and 5 need to be conveyed to sectors 1, 2, 3
18 π represents the minimum return necessary to accomplish the potentialities of the system concerning growth Benchmark from which profit rates cannot depart too much Actual profit rate may be higher with respect to π, in order to facilitate the flows of financial resources among the sectors; to recognize to capitalists a further revenue, to compensate the burden of the risk connected with the undertaking of production activity This reduces wages correspondingly Links with the Cambridge equation: π = 1 s c g
19 Not a conclusion, but a wish
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