Classical Theories of Economics

1. ClassicalTheories of Economics GrowthEconomics Roberto Pasca di Magliano 2015/2016

2. ClassicalTheories of Economics(XIX century) • Adam Smith (1723-1790) • David Ricardo (1772-1823) • Thomas Robert Malthus (1766-1834) • Karl Marx (1818-1883)

3. Adam Smith and the divison of labour (I) An Enquiryinto the Nature and Causes of the Wealth of Nations (1776) -> Optimisticview in contrast with the otherclassicaleconomists Major Contributions: • Division of labor The specialization and concentration of workers on their single subtasks leads to greater skill and greater productivity on their particular subtasks than would be achieved by the same number of workers each carrying out the original broad task. • Specialization of labor + Increasing of the laborproductivity + Increasingreturns Divison of laborallows: 1) improvement of the dexterity of the workman  increases the quantity of the work he can perform; 2) advantage gained by saving the time commonly lost in passing from one sort of work to another; 3) everybody must be sensible to how much labor is facilitated by the application of proper machinery. • Example: pin makers were organized with one making the head, another the body, each using different equipment!

4. Adam Smith and the divison of labour (I) • Prevalent in industries where, thanks to division of labor, productivity has been increased • In agriculture and mining, instead, decreasing productivity, because of the fixed factor earth • The growth of the product depends on the investments and the accumulation of capital: I = f (S) generated by industrial and agricultural profits, and the degree of specialization of labor • Division of labor determines the level of labor productivity, but the division of labor is limited by the size of the market, which in turn depends on the division of labor itself (interactive cumulative process): • “As it is the power of exchanging that gives occasion to the division of labour, so the extent of this division must always be limited by the extent of that power, or, in other words, by the extent of the market. When the market is very small, no person can have any encouragement to dedicate himself entirely to one employment, for want of the power to exchange all that surplus part of the produce of his own labour, which is over and above his own consumption, for such parts of the produce of other men's labour as he has occasion for” (Book I, Chapter III)

5. Adam Smith and the increasingreturns to scale (II) Agriculture • it produces surplus essential for industrial growth… but it is characterized by diminishing returns • Technical progress in agriculture is essential to increase yields • Contribution from the supply side: the free agriculture workers less productive in industry that will benefit from increasing returns • 18° century was a period when the agricultural revolution was spreading before the advent of the industrial revolution • Contribution from the demand side: the growth of the agricultural surplus allows the increase in demand for non-agricultural products that can be bought by exchanging the surplus generated from agriculture • Size of the market • The market is limited as a result of trade restrictions and therefore the division of labor can not manifest all its benefits • Therefore, support the need to free enterprise accompanied by free trade (laissez-faire and laissez-passé) inside and outside • Importance of agricultural exports for growth

6. Adam Smith and the increasingreturns to scale (II) • Engine model is the accumulation of capital profits generated by industrial fuel investments • If the rate of profit falls, it reduces the incentive for investment Ambiguity: • On the one hand, if the capital stock grows (k), the rate of profit is decreasing as a result of the competition between capitalists and wage growth • On the other hand, new investment opportunities are generated and the rate of profit may increase or decrease depending on whether the investments are made ​​in new or old technologies  Then the rate of profit may increase or decrease and there is no reason to think that we are moving towards a steady state or, worse, that it is inevitable (Malthus, Ricardo, Marx) • Smith's theories have had great influence, for example of Myrdal, Hirshman, Lewis and Kaldor

7. Thomas Malthus (I)

8. Thomas Malthus (II) • As growth occurs, the population rapidly increases and reduces the per-capita income • The rate of profit is being eroded by the growth of industry in agricultural prices, resulting from the increased demand and diminishing returns in agriculture, as well as an increase in costs • The application must grow in line with the production capacity, which depends on investment, but there is no assurance of sufficient savings to the investment necessary • Possibility that the per capita income to settle the existence or is caught in a "trap equilibrium Low Level” Pessimistic view of economic growth

9. David Ricardo (I) Principles of Political Economy and Taxation(1817) • Inevitable steady state, withoutgrowth, againas a result of diminishingreturns in agriculture; • As in Smith, growthdepends on capital accumulation, whichdepends on reinvestment of profits; • Profits are sacrificed by subsistencewages and payment of rents to landlords, whichtend to grow due to the increase in agriculturalprices due to diminishingreturns and growth of the marginalcosts (non productivelands); • Theory of distributionaccording to the participation in the process of production: capitalists/rentiers/ workers

10. David Ricardo (II)

11. David Ricardo (III) • With employmentequal to L, and a totalproductequal to ORZL, rentisdetermined by the differencebetween the averageproduct and the marginallabor (Przy) • The subsistencewages are set at OWXL • Profits are equal to the differencebetween the averageyield and yield more wages (WPYX) • Profits are destined to disappearas the averageproductisdecreasingwhile the subsistencewages are obviously hard • In equilibrium the rate of profit isequal to that in agriculture and in industry, since the rate of profit in agriculturedecreases, the capital moving to industry, causing a decline in the rate of profit in industry • Profits in industrytendto decreasebecausewages in terms of foodincrease for livelihoods • Butaccording to Ricardo (unlike Malthus), there are no problems of effectivedemandbecause (aswilllatersay J.B. Say) supplygrowthcreatesitsowndemand

12. David Ricardo (IV) • Profits are engine of growth investmentsensure the accumulation of capital; • There are no limits on the accumulationuntil the returnis positive • Whenyoucancel the profitability in the industry (due to increasedwages and a reduction in the averageproduct) wearriveat steady state • Anyfactorthatreduces the accumulationanticipates steady state • So he wascontrary to taxes, tariffs on production, aswellasduties on imports, especially of food • Campaign for the abolition of the CornLaws • Iffoodpricesremainlow, wages do not rise and leaves the steady state In facterroneousassumptionsbecause: • Itissaidthat the averageproductdecreases in manufactury (industries), but he didnotconsider the role of technical progress!

13. Karl Marx (I) DasKapital (1867)  the collapse of capitalism • Like allclassics, he believesthat the rate of return on capital isgoing to reduce as the economy grows, butClassicsprovidedifferentmotivations: • According to Smith competitionbetweencapitalists; • Ricardo itdepends on the reduction in yields in agriculture and the reduction in profitsforced in wages (up to the increase in agriculturalprices) Marx the limit to growthisnotthe steady state but the rise in the organiccomposition of capital (seebelow). For Marx the heart of the capitalistsystemconsists in the process of capital accumulation: D-M-D '. In the cycle of money-commodity-incrementmoney.

14. Karl Marx (II) Labortheory of value surplus valuegenerated in the exchange betweenlabor and capital  Market value vs. use-value Marxists argue that the value of goods should be calculated in terms of the amount of labor that went into their production. Conventional economics does not do this; it takes as value whatever will be paid in the market place! The amount of capital and laborpurchased by the capital isgreaterthan the amount of laborembodied in goodspurchased from wages (subsistence).

15. Karl Marx (III) • The quantity D (MONEY) isspent in: • C, means of production, constant capital. Itdoesnot generate surplus; transmitsitsvalueunchanged to the goodproduct; • V, labor (variable capital) produces surplus (surplus workday on time sociallynecessary to produce subsistence) generates surplus (surplus product over wagegoods)  surplus value (through the sale of surplus production).

16. Karl Marx (IV) • The value of a commodity and therefore given by the amount of work embedded in it: c + v + s. •  s / v: rate of surplus value, and 'the relationship between surplus and variable capital  measuring the degree of exploitation of labor • c / v: organic composition of capital, and the ratio of constant capital and variable capital. • The rate of profit is given by the ratio between the quantity of labor embodied in the built-in surplus and total capital: • r = s / (c + v) = (s / v) / (1 + c / v) is all the greater as greater is the rate of exploitation and therefore the lower is the organic composition of capital. • Marx argues that a rising organic composition of capital is a necessary effect of capital accumulation and competition in the sphere of production, at least in the long term. This means that the share of constant capital in the total capital outlay increases, and that labor input per product unit declines.

17. Karl Marx (V) Cyclicalcrisis: • Capital accumulationreduces the reservearmy of labor (workers)  the wageincreases by reducings / v • capitalistsreact by substituting capital for labor the army of unemployedworkersisreconstitutedbutnot be able to consumegoodsproduced by  overproductioncrisis (lack of effectivedemand in the field of consumer goods). Finalcrisis: • Competitionamongcapitalistsleads to adopt new techniques capital-intensive risingorganiccomposition of capital. • The positive effect of s / v of technical progress incorporatedintoconstant capital isnotenough to offset the increase in c / v falling rate of profit!