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| The '''big push model''' is a concept in [[development economics]] or [[welfare economics]] that emphasizes that a firm's decision whether to industrialize or not depends on its expectation of what other firms will do. It assumes [[economies of scale]] and [[oligopoly|oligopolistic]] market structure and explains when industrialization would happen.
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| The originator of this theory was [[Paul Rosenstein-Rodan]] in 1943. Further contributions were made later on by [[Kevin M. Murphy|Murphy]], Shleifer and [[Robert W. Vishny]] in 1989. Analysis of this economic model ordinarily involves using [[game theory]].
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| The theory of the model emphasizes that [[Developing country|underdeveloped countries]] require large amounts of investments to embark on the path of [[economic development]] from their present state of backwardness. This theory proposes that a 'bit by bit' investment programme will not impact the process of growth as much as is required for developing countries. In fact, injections of small quantities of investments will merely lead to a wastage of [[resource]]s.
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| [[Paul Rosenstein-Rodan]], approvingly quotes a [[Massachusetts Institute of Technology]] study in this regard, "There is a minimum level of [[resource]]s that must be devoted to... a [[Economic development|development]] programme if it is to have any chance of success. Launching a country into self-sustaining growth is a little like getting an [[airplane]] off the ground. There is a critical [[ground speed]] which must be passed before the craft can become airborne...."<ref name="Rodan-Notes" />
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| [[Paul Rosenstein-Rodan|Rosenstein-Rodan]] argued that the entire industry which is intended to be created should be treated and planned as a massive entity (a [[firm]] or [[Trust (monopoly)|trust]]). He supports this argument by stating that the social [[marginal product]] of an investment is always different from its private [[marginal product]], so when a group of [[Industry|industries]] are planned together according to their social marginal products, the [[Economic growth|rate of growth]] of the economy is greater than it would have otherwise been.<ref name="NATH" />
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| ==The three indivisibilities==
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| According to Rosenstein-Rodan, there exist three indivisibilities in [[Developing country|underdeveloped countries]]. These indivisibilities are responsible for [[Network effect|external economies]] and thus justify the need for a big push. The externalities are as follows-
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| # Indivisibility in [[production function]]
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| # Indivisibility of [[demand]]
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| # Indivisibility in the supply of [[savings]]
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| ===Indivisibility in production function===
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| Indivisibilities in the [[production function]] may be with respect to any of the following:
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| * [[Factors of production|Inputs]]
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| * [[List of industrial processes|Processes]]
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| * [[Output (economics)|Outputs]]
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| These lead to increasing returns (i.e., [[economies of scale]]), and may require a high optimum size of a firm. This can be achieved even in developing countries since at least one optimum scale firm can be established in many industries. But investment in [[social overhead capital]] comprises investment in all basic industries (like [[Electric power industry|power]], transport or communications) which must necessarily come before directly productive investment activities. Investment in social overhead [[Capital (economics)|capital]] is 'lumpy' in nature. Such capital requirements cannot be imported from other nations. Therefore, heavy initial investment necessarily needs to be made in social overhead [[Capital (economics)|capital]] (this is approximated to be about 30 to 40 percent of the total investment undertaken by [[Developing country|underdeveloped countries]]).
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| Social overhead capital is further characterized by four indivisibilities:
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| # ''Irreversibility in time'': It must precede other directly productive investments
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| # ''Minimum durability of equipment'':. Any lesser level of [[Durable good|durability]] is either impossible due to technical reasons or much less [[Economic efficiency|efficient]]
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| # ''Long gestation periods'': The investment in social overhead [[Capital (economics)|capital]] takes time to generate returns and its impact in the economy is not immediately or directly visible
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| #''Irreducible minimum social overhead capital–industry mix'': Investment needs to be of a certain minimum magnitude and spread across a mix of industries, without which it will not significantly impact the process of growth.
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| ===Indivisibility (or complementarity) of demand===
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| Developing countries are characterized by low per-capita income and purchasing power. Markets in these countries are therefore small. In a [[Autarky|closed economy]], modernization and increased efficiency in a single industry has no impact on the economy as a whole since the output of that industry will fail to find a market. A large number of industries need to be set up simultaneously so that people employed in one industry consume the output of other industries and thus create [[Complementary good|complementary]] demand.
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| To illustrate this, Rosenstein Rodan gives the example of a shoe industry. If a country makes large investments in the shoe industry, all the disguisedly employed labor from the other industries find work and a source of income, leading to a rise in production of shoes and their own incomes. This increased income will not be expended only on buying shoes. It is conceivable that the increased incomes will lead to increased spending on other products too. However, there is no corresponding supply of these products to satisfy this increased demand for the other goods. Following the basic [[Free market|market forces]] of demand and supply, the prices of these commodities will rise. To avoid such a situation, investment must be spread out amongst different industries.
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| The situation may be different in an [[open economy]] as the output of the new industry may replace former imports or possibly find its market by way of exports. But even if the world market acts as a [[Substitute good|substitute]] for domestic demand, a big push is still needed (though its required size may now be reduced due to the presence of international trade).
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| ===Indivisibility in the supply of savings===
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| High levels of investment require a corresponding high level of savings. We cannot always rely on foreign aid as the huge levels of investments in the different [[Economic sector|sectors]] need to be made not only once, but multiple number of times. Hence domestic savings are a must. But in an underdeveloped economy,this is a challenge due to the low income levels.[[Marginal propensity to save|Marginal rate of savings]] needs to be increased following the rise in incomes due to higher investment.
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| == How the big push works ==
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| [[File:Figure 1 Operation of Big Push.png|thumb|right|500px|500px|alt=|Fig.1]]
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| Consider a country whose economy is characterized by a large number of [[Economic sector|sectors]] which are so small that any increase in the productivity of one sector has no impact on the economy as a whole. Each sector can either rely on traditional methods or switch to modern methods of production which would increase its efficiency. Let us assume that there are <math>l</math> workers in the economy and <math>n</math> sectors. Each sector therefore has <math>{l}/{n}</math> workers.
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| ''Using traditional technology'', a sector would produce <math>{l}/{n}</math> amount of output, with each worker producing one unit of the commodity.
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| ''Using modern technology'' a sector would produce more as the productivity would be greater than one unit per worker. However, a modern sector would require some of the workers (say <math>h</math>) to perform administrative tasks.
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| In figure 1, the x-axis represents the labor employed and the y-axis represents the level of production. The production in the traditional [[Economic sector|sector]] is given by the curve T and the production in the modern sector is given by M. The curve M has a positive intercept on the x-axis, implying that even with zero production, there is a minimum level of <math>h</math> workers who still remain employed for carrying out administrative activities. With our assumption of <math>{l/n}</math> workers in the economy, the modern sector will have a higher level of productivity than the traditional sector. The production function of the modern sector is steeper than that of the traditional sector because of the higher productivity of workers in the former. The slope of both production functions is <math>{1}/{m}</math>, where <math>m</math> is the marginal labor required to produce an additional unit of output. This level of <math>m</math> is lower for the modern sector than it is for the traditional sector.
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| [[File:Figure 2 High and low wages.png|thumb|left|500px|500px|alt=|Fig.1]]
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| Assume that the traditional sector pays workers one unit of output which is subsequently spent equally by them in all sectors. The modern sector pays higher wages to workers. If all the workers are employed by the traditional sector, then the demand generated for the output of each sector is <math>D_1={1}/{n}</math>.
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| We have two possible cases:
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| * ''Wages are low'' – When low wages are prevalent in the economy, say <math>w_1</math>, a firm which faces demand <math>D_1</math> will need to employ <math>l^*</math> workers if it wants to modernize. This will cost the firm <math>w_1l^*</math>.
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| :Now, wages are low. Therefore
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| ::<math>w_1l^*<D_1</math>.
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| :This implies that costs (given by <math>w_1l^*</math>) are lower than the earnings (given by <math>D_1</math>). So the firm makes a profit and will choose to modernize (even if other firms do not).
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| * ''Wages are high'' – When high wages are prevalent in the economy, say <math>w_2</math>, a firm which faces demand <math>D_1</math> will make losses if no other firms choose to modernize.
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| :This is because
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| ::<math>w_2l^*>D_1</math>.
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| :This implies that costs (given by <math>w_2l^*</math>) are higher than the earnings (given by <math>D_1</math>).
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| :However, if all the other firms have modernized, the firm faces a higher demand <math>D_2</math>, arising out of higher income levels of workers of these modernized firms. The firm will hence choose to modernize as well so that it makes profits:
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| ::<math>w_2l^*<D_2</math>.
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| {{-}}
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| ==Indivisibilities and external economies==
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| The concept of [[Externality|externalities]] is relevant for the Industrialization of [[Developing country|underdeveloped countries]], where decisions are to be made regarding distribution of savings among alternative [[Investment|investment opportunities]]. These arise from the interdependence in market economies.<ref name="SCI" />
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| '''[[Pecuniary externality|Pecuniary economies]]''' are [[Externality#Positive|external economies]] transmitted through the [[price system]], as prices are the [[Price signal|signalling]] device (under conditions of [[perfect competition]] in a market economy). They arise in an industry (say industry X) due to internal economies of overcoming technical indivisibilities. This reduces the price of its product, which will benefit another industry (say industry Y) which use this output as an input or a factor of production.<ref name="MYI" /> Subsequently, the profits of industry Y will rise, leading to its expansion and generating demand for the output of industry X. As a result, industry X's production and profits also expand.<ref name="AGA-SINGH" />
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| However in [[Developing country|underdeveloped countries]], conditions of [[perfect competition]] are not present due to the [[Decentralization#Economic decentralization|decentralized]] and differentiated nature of the market. Prices fail to act as a [[Price signal|signalling system]] in the following ways:<ref name="SCI" />
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| * Prices express the situation as it is and do not predict future economic situations
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| * Prices can decide present productive activities but cannot determine investments which would be appropriate for developing countries
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| * The response of the private sector to price signals is inadequate and imperfect due to the differentiation and decentralisation in developing countries
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| This justifies the need for centralized pan-industry planning of investment in Developing countries, as the private sector cannot undertake such planning.
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| '''Enlargement of the market size''' is another important externality which arises from the complementarity of industries. There exists an incentive to expand the scale of operations because the employees of one industry become the customers of another industry. In terms of products too (as in the above example of industries X and Y), one industry generates demand for the output of the other when the scale of operations increase.<ref name="MEA" />
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| '''Marshallian economies''' also accrue to a firm within a growing industry, resulting from agglomeration of industrial districts or clusters in a particular area. These occur due to the following advantages of agglomeration identified by [[Alfred Marshall]]:
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| # Spillover of information
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| # Specialization and division of labor
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| # Development of a market for skilled labor.<ref name="AGA-SINGH" />
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| '''Availability of skilled labour''' is an externality which arises when industrialization occurs, as workers acquire better training and skills. This is not achievable by mere establishment of a few industries, but requires a large program of industrial growth. It is one of the most important external economies because absence of skilled labor is a strong impediment to industrialization.<ref name="MISPURI" />
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| == Role of the State ==
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| The large-scale programme of industrialization advocated by this model requires huge investments which are beyond the means of the private sector. The investment in infrastructure and basic industries (like power, transport and communications) is 'lumpy' and has long gestation periods. The role of the state in this theory is therefore critical for investment in social overhead [[Capital (economics)|capital]]. Even if the private sector had the requisite resources to invest in such a programme, it would not do so since it is driven by profit motives.<ref name="MISPURI" />
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| Many investments are profitable in terms of social marginal net product but not in terms of private marginal net product. Due to this there is no incentive for individual entrepreneurs to invest and take advantage of external economies.<ref name= "Rodan-Notes" />
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| == Criticisms ==
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| The theory has been criticized by [[Hla Myint]] and [[Celso Furtado]], among others, primarily on the grounds of the massive effort required to be taken by [[Developing country|underdeveloped countries]] to move along the path of industrialization. Some of the major criticisms are as follows.
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| * ''Difficulties in execution and implementation'': The execution of related projects during the course of industrialization may involve unexpected or unavoidable changes due to revisions of plans, delays and deviations from the planned process. [[Hla Myint]] notes that the various departments and agencies involved in the process of development need to coordinate closely and evaluate and revise plans continuously. This is a challenging task for the governments of developing countries.<ref name="MYI" />
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| * ''Lack of absorptive capacity'': The implementation of industrialization programmes may be constrained by ineffective disbursement,short-term bottlenecks, [[Macroeconomics|macroeconomic]] problems and volatility, loss of competitiveness and weakening of institutions. [[Credit (finance)|Credit]] is often utilized at low rates or after long time lags. There is often a loss of competitiveness due to the [[Dutch disease]] effect.<ref name="PAT" />
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| * ''Historical inaccuracy'': When viewed in light of historical experience of countries over the last two centuries, no country displayed any evidence of development due to massive industrialization programmes. [[Steady-state economy|Stationary economies]] do not develop simply by making large-scale investment in social overhead [[Capital (economics)|capital]].<ref name="FURT" />
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| * ''Problems in mixed economies'': In a [[mixed economy]], where the [[Private sector|private]] and [[public sector]]s co-exist, the environment for growth may not be a conducive one. Unless there is a [[Complementary good|complementarity]] between the sectors, there is bound to arise competition between them, with the [[Ministry (government department)|government departments]] keeping their plans confidential out of fear of [[Speculation|speculative activities]] by the [[private sector]]. The private sector's activities are simultaneously inhibited due to [[Information asymmetry|lack of information]] of government policies and the general economic situation<ref name="MYI" />
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| * ''Neglect of methods of production'': Rather than [[Capital (economics)|capital]] formation, it is productive techniques which determine the success of a country in [[economic development]]. The big push model ignores productive techniques in its support for [[Capital (economics)|capital]] formation and industrialisation.<ref name="FURT" />
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| * ''Shortage of resources in underdeveloped countries'': Eugenio Gudin criticizes the theory of the big push on the grounds that [[Developing country|underdeveloped countries]] lack the [[Capital (economics)|capital]] required to provide the big push required for rapid [[Economic development|development]]. If an underdeveloped nation had ample [[Capital (economics)|capital]] supply and scarce [[Factors of production|factors]], it would not be classified as ''underdeveloped'' at all. Limited [[resource]] availability is the first impediment to such countries. Though this problem may be overcome by foreign aids, industrialization may not take off as expected if the aid flows are volatile.<ref name="PAT" />
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| * ''Ignores the agricultural sector'': With its heavy emphasis on industry, the model finds no place for agriculture. This is a gaping flaw in the theory, as in most [[Developing country|underdeveloped countries]] it is this sector which is large and has labor [[Economic surplus|surplus]]. Investments in agriculture need to go hand-in-hand with those in industry so as to [[Stimulus (economics)|stimulate]] the industrial sector by providing a market for industrial goods. If neglected, it would be difficult to meet the food requirements of the nation in the [[Long run and short run|short run]] and to significantly expand the [[Market#Size parameters|size of the market]] in the [[Long run and short run|long run]].
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| * ''Inflationary pressures'': It follows from the neglect of the agricultural sector that [[Famine|food shortages]] are likely to occur with industrialization. Though it would take time for investments in social overhead [[Capital (economics)|capital]] to yield returns, the [[Demand (economics)|demand]] would increase immediately, thus imposing [[Inflation|inflationary pressures]] on the economy. Cost escalations may even cause projects to be postponed and the [[Economic development|development]] process in general to slow down.<ref name="Rodan-Notes" />
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| * ''Dependence on indivisibilities'': The emphasis of this theory on indivisibility of processes is too much, as investments need not necessarily be on such a large scale to be economic. [[Reform movement|Social reforms]] are ignored, which are vital if a country is to grow on the basis of its own [[resources]] and initiatives. [[Economic development|Development]] is bound to intensify if social reform is a part of the industrialization process.<ref name="FURT" />
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| ==See also==
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| *[[Rostow's stages of growth]]
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| *[[Ragnar Nurkse]]
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| *[[Ragnar Nurkse's Balanced Growth Theory]]
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| *[[Virtuous circle and vicious circle]]
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| *[[Critical minimum effort theory]]
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| *[[Strategy of unbalanced growth]]
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| *[[Low level equilibrium trap]]
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| *[[Dual economy]]
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| {{Partial Theories of Development-footer}}
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| ==References==
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| {{Reflist|refs=
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| * <ref name=MYI>{{citation|last=Myint|first=Hla|title=The Economics of the Developing Countries|publisher=Hutchinson University Library|year=1969|pages=119}}</ref>
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| * <ref name=AGA-SINGH>{{citation|title=The Economics of Under[[Economic development|development]]|publisher=Oxford University Press India|year=1969|ISBN=978-0-19-560674-4|pages=303–4|author=A.N. Agarwala, S.P. Singh}}</ref>
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| * <ref name=SCI>{{citation|last=Scitovsky|first=Tibor|title="Two Concepts of External Economies" in "The Journal of Political Economy",Vol.62,no.2|publisher=Chicago University Press|year=April 1954|pages=143–151}}</ref>
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| * <ref name=MEA>{{citation|last=Meade|first=James|title="External Economies and Diseconomies in a Competitive Situation" in "The Economic Journal",Vol.62,no.245|publisher=Royal Economic Society|year=March 1952|pages=54–67}}</ref>
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| * <ref name=Rodan-Notes>{{citation|title="Notes on the theory of the Big Push", in Howard S. Ellis (ed.) for Latin America|publisher=Macmillan & Co.|year=1961}}</ref>
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| * <ref name = MISPURI>{{cite book|title=Economics Of Development And Planning — Theory And Practice|year=2010|publisher=Himalaya Publishing House|isbn=81-8488-829-5|author=S. K. Misra|edition=12th edition|coauthors=V. K. Puri|pages=217–222}}</ref>
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| * <ref name=PAT>{{citation|title=Big Push versus Absorptive Capacity: How to Reconcile the Two Approaches|publisher=United Nations University – World Institute for Development Economics Research Discussion Paper No. 2007/05|year=October 2007|author=Patrick Guillaumont, Sylviane Guillaumont Jeanneney}}</ref>
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| * <ref name=FURT>{{citation|last=Furtado|first=Celso|title="Development and Underdevelopment: A Structural View of the Problems of Developed and Underdeveloped Countries" (translated by Ricardo de Augiar and Eric Charles Drysdale)|publisher=University of California Press|year=1964}}</ref>
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| * <ref name=NATH>{{citation|last=Nath|first=S.K.|title="The Theory of Balanced Growth",Oxford Economic Papers, Vol. 14, No. 2|publisher=Oxford University Press|year=June 1962|pages=138–153}}</ref>
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| * P Krugman, 1991: History vs Expectation. ''The Quarterly Journal of Economics''
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| * P Krugman, 1992: Toward a counter-counterrevolution in [[Economic development|development]] theory. ''Proceedings of the World Bank Annual Conference on [[Economic development|development]] Economics''
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| * KM Murphy, A Shleifer, RW Vishny, 1989: [[Industrialisation]] and the Big Push. ''The Journal of Political Economy'' Vol. 97, pp. 1003–1026
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| * PN Rosenstein-Rodan, 1943: The Problems of Industrialisation of Eastern and South-Eastern Europe. ''The Economic Journal'' Vol.53
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| * [[Richard R. Nelson (economist)|R Nelson]], 1956: A Theory of the Low-Level Equilibrium Trap in Underdeveloped Economies. ''American Economic Review'' Vol. 46(5), pp. 894–908
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| *[[UN Millennium Project]], 2005: Investing in [[Economic development|development]]: A Practical Plan to Achieve the Millennium [[Economic development|development]] Goals. New York: United Nations
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| *
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| }}
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| == Further reading ==
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| # http://m.domaindlx.com/cihanyuksel2/Two%20Concepts%20of%20External%20Economies.pdf
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| # http://www.colorado.edu/Economics/morey/externalitylit/meade-ej1952.pdf
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| # http://www.wider.unu.edu/publications/working-papers/discussion-papers/2007/en_GB/dp2007-#
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| # 05/_files/78515953270128788/default/dp2007-05.pdf
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| # http://www.econometricsociety.org/meetings/wc00/pdf/1269.pdf
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| # http://www.centrocelsofurtado.org.br/adm/enviadas/doc/25_20060719190655.pdf
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| == External links ==
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| # http://monthlyreview.org/2006/05/01/the-neoliberal-rebirth-of-development-economics
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| # http://are.berkeley.edu/~adelman/WORLDEV.html
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| [[Category:Economics models]]
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