Technological theory of social production

Last updated September 17, 2022

In the technological theory of social production, the growth of output, measured in money units, is related to achievements in technological consumption of labour and energy. This theory is based on concepts of classical political economy and neo-classical economics and appears to be a generalisation of the known economic models, such as the neo-classical model of economic growth and input-output model.

The main relations of the theory

The major characteristics of social production is its output $Y$ , that is production of value in unit of time, the original sources of which are production factors, which are some universal characteristics of production processes. In classical political economy (Smith, Marx, Ricardo), it is human efforts (labour) $L$ , which are measured in working hours. Neoclassical practice ^[1]^[2] adds capital $K$ , which is a money estimate of production equipment, that is value of the collection of all energy-conversion machines and information processing equipment, plus ancillary structures to contain and move them, including residential housing, when one considers capital in a wider sense. The earliest theories assumed, that output $Y$ can be considered a function of labour $L$ and capital $K$ , as creative factors of production,

Y=Y(K,L).

This relation formalised the concept of neo-classical political economy about substitution of labour by capital. There can be different realisation of the above function. The next important step to the understanding of economic growth was done in the middle of the past century. To incorporate into the theory technological progress, which is believed is ultimately the source of economic growth in developed countries in recent centuries, it was suggested^[2] to modify concepts of arguments in the production function and consider them to be not capital and expenditures of labour, but services of the capital $K'$ and work $L'$ , so that

Y=Y(K',L').

The quantity $K'=A_{K}(t)K$ and $L'=A_{L}(t)L$ are capital and labour services which are connected with measured quantities of capital stock $K$ and labour $L$ , but are somewhat different from them. In other words, an extra time dependence of the production function (so called exogenous technological progress) has to be assumed. This approach describes the empirical data by use of the two production factors and some empirical quantity called total factor productivity. Suggesting that capital service $P=A_{K}(t)K$ can be considered as an independent variable, whereas labour service $L'=L$ is regarded just as labour, one came to the formulation of technological theory, in which, taking also capital stock $K$ into account, production of value $Y$ can be considered as a function of the three production factors

Y=Y(K,L,P)

This function can also be compared with the previous equation, in which capital as variable played two distinctive roles: capital stock as value of production equipment and capital service as a substitute of labour. The only thing which is done is a separation of the two roles of capital: we consider capital stock $K$ to be the means of attracting labour $L$ and capital service $P$ , to the production. It was shown also that capital service $P$ , as one of the three factors of production, has a meaning of substitutive work of production equipment (energy delivered to animate production equipment).^[3]^[4]^[5]^[6]^[7] The theory was considered in one sector an approximation of the production system, including some reference to multi-sector approach.

Dynamics of production factors

The expansion of production, characterised by changes of the accumulated value $K$ , requires additional labour $L$ and substitutive work $P$ , so that dynamics of the production factors can be written^[5]^[6] as the balance equations

{\frac {dK}{dt}}=I-\mu K,\quad {\frac {dL}{dt}}=\left({\bar {\lambda }}{\frac {I}{K}}-\mu \right)L,\quad {\frac {dP}{dt}}=\left({\bar {\varepsilon }}{\frac {I}{K}}-\mu \right)P.

(1)

The first terms in the right side of these relations describe the increase in the quantities caused by gross investments $I$ accumulated in a material form of production equipment. Equations (1) introduce the quality of investment that is technological characteristics of production equipment: coefficients of labour and energy requirement, which can be manipulated both in the dimensional, $\lambda$ and $\varepsilon$ , and dimensionless (with a bar on the top) forms, ${\bar {\lambda }}=\lambda K/L$ and ${\bar {\varepsilon }}=\varepsilon K/P.$ The second terms on the right side of equations (1) reflect the decrease in the corresponding quantities due to the removal of a part of the production equipment from service with the depreciation coefficient $\mu$ , which is taken equal for all factors due to assumption, that the technological characteristics of the equipment do not change after its installation, otherwise the dynamic equations takes a more complex form.^[5]

Production function

Production function, as function of independent variables: labour $L$ , capital $K$ and substitutive work $P$ , have to satisfy some requirements, which help to determine its form. Taking into account that substitutive work $P$ and labour $L$ inputs are substitutes to each other and capital $K$ has to be considered to be a complement to work ( $L$ and $P$ ) of the production equipment, the production function for our case can be specified^[6]^[8] as:

Y={\begin{cases}\xi K,&\xi >0\\Y_{0}{\frac {L}{L_{0}}}\left({\frac {L_{0}}{L}}{\frac {P}{P_{0}}}\right)^{\alpha },&0<\alpha <1\end{cases}}

(2)

where $Y_{0}$ , $L_{0}$ and $P_{0}$ correspond to output, labour and substitutive work in the base year. The index $\alpha$ is connected with technological characteristics of production equipment

\alpha ={\frac {1-{\bar {\lambda }}}{{\bar {\varepsilon }}-{\bar {\lambda }}}}

(3)

After differentiating of relations (2), one get the expression for the growth rate of output

{\frac {1}{Y}}{\frac {dY}{dt}}=(1-\alpha ){\frac {1}{L}}{\frac {dL}{dt}}+\alpha {\frac {1}{P}}{\frac {dP}{dt}}+\ln \left({\frac {L_{0}}{L}}{\frac {P}{P_{0}}}\right){\frac {d\alpha }{dt}}

(4)

The first terms in the right side of the equation represent a contribution to the growth rate of output of the growth rate of production factors: labor and substitution work, the latter - a contribution due to changes in the production system directly. The productivity of the capital stock $\xi$ and the index $\alpha$ in equation (2) are parameters of the production system itself, and their derivatives are related to each other and to the characteristics of production system^[5] as

{\frac {1}{\xi }}{\frac {d\xi }{dt}}=\ln \left({\frac {L_{0}}{L}}{\frac {P}{P_{0}}}\right){\frac {d\alpha }{dt}}.

(5)

In the multi-sector approach (input-output model), changes in the technological index are related to aggregate sectoral technological change and to the difference in the growth rates across sectors.^[5]

This formulation offers two complementary descriptions of the production of value. The first line in equation (2) relates output to the amount of production equipment (capital stock) while the second describes the process of production through property of the same equipment to attract labour and energy (labour and substitutive work). The first line is analogous to the production technology found in the Harrod-Domar growth model,^[9]^[10]^[11]^[12] while the function in the second resembles the Cobb-Douglas production function.^[1]

Three modes of development

The real investments are determined by the assumption that the production system tries to swallow up all available production factors. In any case the rates of real growth do not exceed the rates of potential growth, given as functions of time

{\tilde {\delta }}(t)\geq \delta ={\frac {1}{K}}\,{\frac {dK}{dt}},\quad {\tilde {\nu }}(t)\geq \nu ={\frac {1}{L}}\,{\frac {dL}{dt}},\quad {\tilde {\eta }}(t)\geq \eta ={\frac {1}{P}}\,{\frac {dP}{dt}},

(6)

so that, in virtue of equations (1), one ought to write for investments

I=(\delta +\mu )K=\min {\begin{cases}({\tilde {\delta }}+\mu )K\\({\tilde {\nu }}+\mu )K/{\bar {\lambda }}\\({\tilde {\eta }}+\mu )K/{\bar {\varepsilon }}\end{cases}}.

(7)

The three lines of this relation define three modes of economic development, for which one has different formulae for calculation of the rates of real growth. The first line in (5) is valid in the case of lack of investment, abundance of labour, energy and raw materials. The second line is valid in the case of lack of labour, abundance of investment, energy and raw materials. The last line of equations is valid in the case of lack of energy, abundance of investment, labour and raw materials.

Dynamics of technological coefficients

Assuming also, that the technological coefficients have tendencies to change in such a way that the production system tries to exploit all available production factors, in the first approximation, one can get^[5] the equations for the technological coefficients

{\frac {d{\bar {\lambda }}}{dt}}=-{\frac {1}{\tau }}\left({\bar {\lambda }}-{\frac {{\tilde {\nu }}+\mu }{{\tilde {\delta }}+\mu }}\right),\quad {\frac {d{\bar {\varepsilon }}}{dt}}=-{\frac {1}{\tau }}\left({\bar {\varepsilon }}-{\frac {{\tilde {\eta }}+\mu }{{\tilde {\delta }}+\mu }}\right),

(8)

where $\tau$ is time of crossover from one technological situation to another, when external parameters ${\tilde {\nu }}$ and ${\tilde {\eta }}$ change. It is determined by internal processes of attracting of the proper technology.

Implementations

The written above relations present a framework of description of economic development, which can be applied in case, if availability of production factors, determined by their rates of potential growth ${\tilde {\nu }}$ for labour and ${\tilde {\eta }}$ for substitutive work, are given. The first quantity is connected with number of population, in fact, one can count that labour force is about half of the total number of population. The availability of substitutive work is a more uncertain quantity. It is determined by fundamental results of science, by research, by project works, and by materialisation of all human imagination about how to use energy instead of labour for production. The availability of production factors ought to be endogenous in a problem of evolution of human population, when dynamics of population and stock of knowledge are included into consideration.

Productivity of labour

The scientific and technical progress can be reduced to processes of introduction of innovations, that is consecutive replacement of instruments, materials, designs, adaptations and other objects with more perfect from this or that point of view. Among all processes of replacement, the outstanding role is played the process of replacement of alive work by work of machines with assistance of forces of the nature. Substitution of efforts with work of machines is unique process of replacement which influences the labor productivity as the ratio of value of output to expenditures of labour. Productivity of labour depends on the ratio of substitutive work to workers' efforts $P/L$ and, according to (2), can be expressed as

B={\frac {Y}{L}}={\frac {Y_{0}}{L_{0}}}\left({\frac {L_{0}}{L}}{\frac {P}{P_{0}}}\right)^{\alpha }.

(9)

Here, output should be measured in value units of constant purchasing capacity, that is, as one speaks, to represent a 'physical' measure of output.

The growth rate of labour productivity is expressed via four quantities as

{\frac {1}{B}}{\frac {dB}{dt}}={\frac {(1-{\bar {\lambda }})(\nu +\mu )}{\bar {\lambda }}}+{\frac {1}{\xi }}{\frac {d\xi }{dt}}

(10)

The labour requirement ${\bar {\lambda }}$ appears to be the most important quantity, which determines the change of productivity of labour. If ${\bar {\lambda }}=1$ , variations in technology do not occur, labor productivity is constant, and all increment of output is connected only with an increase in human's efforts. Human efforts are, certainly, the main motive power, but, under condition of ${\bar {\lambda }}<1$ the workers' efforts partially are replaced with work of the machines movable by outer energy sources, and the labor productivity increases. This is a general description of influence of scientific and technological progress, which is naturally entered in a picture of progress of mankind.

Increase in labor productivity cannot be understood without taking into account the phenomenon accompanying progress of production - attraction of natural energy sources (animals, wind, water, coal, oil and others) for performance of works that replaces efforts of the humans in production. The developing of machine technologies appears to give increase, via effect of substitution, in labour productivity. A progressively greater amount of energy is used by human societies via improvements in technology.

Exponential growth

The theory can be applied to describe the 'stylised' facts of economic growth, that is, exponential growth of output and production factors. In such, relatively calm periods of development, the rates of growth of production factors can be considered to be constant, which gives, according to equation (1), exponential growth of production factors

K=K_{0}e^{\delta t},\quad L=L_{0}e^{\nu t},\quad P=P_{0}e^{\eta t}.

(11)

To obtain an expression for output, one refers to relations (2) and (8), according to which, the output can be written in the following form

Y=Y_{0}e^{[\nu +\alpha (\eta -\nu )]t}=Y_{0}e^{\delta \,t}.

(12)

This relation describe a well known fact, that the growth rate of output is equal to the growth rate of capital.^[13]^[14] The difference between the growth rates of capital and output seems to be quite unreliable, given the rough estimate of the parameters of the problem, though, at more detailed consideration, the difference can be explained by distinction of the growth rates of sector outputs.^[5]

The rate of growth of output can be broken on two parts, while on the average a fraction of the rate $(1-\alpha )\nu$ is connected with growth of expenditures of labour, and the other part $\alpha \eta$ —with growth of substitutive work. The theory predicts, that in the future, when $\nu \rightarrow 0$ and energy conversion efficiency approaches thermodynamic limits, the growth rate of output approaches to the growth rate of consumption of total amount of energy carrier multiplied by the technological coefficient $\alpha$ .

Though capital is the means of attracting the production factors to production, increase in consumption of the production factors is connected with increase in capital. One can formally separate the growth rate of capital $\delta$ in the growth rate of output to get the expression for conventional Solow residual (total factor productivity) in neoclassical theory of economic growth as

Solow\;\;Residual=\alpha (\eta -\delta )=(1-\alpha )(\delta -\nu )

(13)

.

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References

1 2 G.W. Cobb and P.N. Douglas, A Theory of Production, American Economic Review, Suppl. (March 1928), pp. 139-165.
1 2 R. Solow, Technical Change and the Aggregate Production Function, Review of Economic Studies, vol. 39 (Aug. 1957), pp. 312-330.
↑ B.C. Beaudreau, Energy and Organization: Growth and Distribution Reexamined (Greenwood Press, the first ed., 1998; the second ed.: 2008).
↑ B.C. Beaudreau, Energy rent. A scientific theory of income distribution. New York, Lincoln, Shanghai: iUniverse, Inc., 2005.
1 2 3 4 5 6 7 V.N. Pokrovski, Physical Principles in the Theory of Economic Growth, Ashgate Publishing, Aldershot, 1999. A revised and extended version of the monograph is published by Springer (2011) as Econodynamics. The Theory of Social Production.
1 2 3 V.N. Pokrovski, Energy in the theory of production, Energy 28 (2003) 769-788.
↑ V.N. Pokrovski, Productive energy in the US economy, Energy 32 (5)(2007) 816-822.
↑ Beaudreau B.C., Pokrovskii V.N. On the energy content of a money unit. {\it Physica A: Statistical Mechanics and its Applications}. 389 (13), 2597 - 2606 (2010).
↑ Harrod, R.F. An Essay in Dynamic Theory, Economic Journal, vol. 49 (March), pp. 14-23. (1939).
↑ Harrod, R.F. Towards a Dynamic Economics, Macmillan, London, 1948.
↑ Domar, E.D. Expansion and Employment, American Economic Review, vol. 37 (1), pp. 343-355 (1947).
↑ Domar, E.D. et al. 'Economic Growth and Productivity in the United States, Canada, United Kingdom, Germany and Japan in the Post-War Period', Review Economic Statistics, vol. 46 (1), pp. 33-40 (1964).
↑ Blanchard, O.J. and Fisher, S. Lectures on Macroeconomics, MIT Press, Gambridge MA, 1989.
↑ Scott, M.FG. A New View of Economic Growth, Clarendon Press, Oxford, 1989.

External links

Pokrovskii, Vladimir N. (2011) Econodynamics. The Theory of Social Production, Springer, Dordrecht, Heidelberg et cetera.

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[cobb-1] 1 2 G.W. Cobb and P.N. Douglas, A Theory of Production, American Economic Review, Suppl. (March 1928), pp. 139-165.

[sollow-2] 1 2 R. Solow, Technical Change and the Aggregate Production Function, Review of Economic Studies, vol. 39 (Aug. 1957), pp. 312-330.

[3] B.C. Beaudreau, Energy and Organization: Growth and Distribution Reexamined (Greenwood Press, the first ed., 1998; the second ed.: 2008).

[4] B.C. Beaudreau, Energy rent. A scientific theory of income distribution. New York, Lincoln, Shanghai: iUniverse, Inc., 2005.

[book-5] 1 2 3 4 5 6 7 V.N. Pokrovski, Physical Principles in the Theory of Economic Growth, Ashgate Publishing, Aldershot, 1999. A revised and extended version of the monograph is published by Springer (2011) as Econodynamics. The Theory of Social Production.

[article-6] 1 2 3 V.N. Pokrovski, Energy in the theory of production, Energy 28 (2003) 769-788.

[7] V.N. Pokrovski, Productive energy in the US economy, Energy 32 (5)(2007) 816-822.

[8] Beaudreau B.C., Pokrovskii V.N. On the energy content of a money unit. {\it Physica A: Statistical Mechanics and its Applications}. 389 (13), 2597 - 2606 (2010).

[9] Harrod, R.F. An Essay in Dynamic Theory, Economic Journal, vol. 49 (March), pp. 14-23. (1939).

[10] Harrod, R.F. Towards a Dynamic Economics, Macmillan, London, 1948.

[11] Domar, E.D. Expansion and Employment, American Economic Review, vol. 37 (1), pp. 343-355 (1947).

[12] Domar, E.D. et al. 'Economic Growth and Productivity in the United States, Canada, United Kingdom, Germany and Japan in the Post-War Period', Review Economic Statistics, vol. 46 (1), pp. 33-40 (1964).

[13] Blanchard, O.J. and Fisher, S. Lectures on Macroeconomics, MIT Press, Gambridge MA, 1989.

[14] Scott, M.FG. A New View of Economic Growth, Clarendon Press, Oxford, 1989.

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