The Multiplier effect explained and with examples.

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          According to Haggett (2001, p.789), “Multiplier effect is a term used in systems thinking to describe the process by which changes in one field of human activity (subsystem) sometimes act to promote changes in other fields (subsystems) and in turn act on the original subsystem itself. An instance of positive feedback, it is thought by some to be one of the primary mechanisms of societal change”.

         The scheme printed below reflects the main ideas of Myrdal’s model of cumulative causation.

   

      Source:

       This scheme shows that everything is related to each other. According to official returns (Haggett, 2001,p.244), the new market creates a number of new jobs in the local area. If the average family sizes four, that means that 100 jobs will lead to 400 more people in the household sector. However, these new people will demand new schools, what will create more jobs in service sector and construction industry. Also, it will attract more firms linked to original industry, migrants, entrepreneurs and capital, what will give more profit and new jobs.

       Another words, the idea of the multiplier effect is that initial investment leads to increased prosperity. Money is generated by the industry and is spent on other goods and services, which in turn increases demand and economic activity.

        Myrdal’s model of the cumulative causation has many advantages because it explains simply why the local economy grows and people become rich. As Naggett (2001,p.560) pointed out, “Although Myrdal’s model of the multiplier effect has been criticized for its qualitative nature and lack of econometric substance, the more formal models also fail to demonstrate conclusively the direction of movement. Such models take no account of the differences within the country and are based mainly on European history”. Nevertheless, Myrdal’s model works rather well in real world. The significance of this model can be explained with reference to South Wales and M4 (the Western) Corridor.

        It is known that in the past the industrial areas of South Wales depended upon two major industries: coalmining and steel production. This region had the ideal location for iron making, because coal, limestone and blackband iron ore were often found together on valley sides. The figure printed below proves the ideal location of these raw materials.

Source: Waugh, D., 1995, Geography. An Integrated Approach, London, Nelson.

        When new techniques such as oil burning instead of coal burning and steel making had appeared, the coal industry and new alloys of metals began to decline. According to Lines and Bolwell (1994, p.52), the number of mines has decreased rapidly and famous coal mining areas such as the Rhondda Valleys have lost their industrial base, what created serious problem of unemployment.

         In this situation only government intervention, which caused the influx of investments, helped to stop the decrease in the economy. Reference to Lines and Bolwell (1994, p.53) reveals that the Special Areas Act of 1934, the creation of Britain’s 27 Enterprise Zones, which included Milford Haven Waterway, and the efforts of the Welsh Development Agency attach many investments, mainly from Japan, the USA and Germany. As Lines and Bolwell (1994, p.53) point out, “The £585 million capital investment was put in the South Welsh economy, 147 projects were done and over 330 foreign manufacturing firms (150 from Europe, 140 from North America and 41 from Japan) were opened there”. This caused increase of labour, because only hi-tech Japanese firms employed 12000 people. Also, as new hi-tech industry demanded skilled workers, new schools and universities had to be opened. Finally, the overseas investments brought new jobs, improved housing and the local environment that made South Wales more diversified economically and more prosperous.

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         Another area, which was developing according to Myrdal’s model of multiplier effect, is the M4 Corridor. This area is known to be one of the few rapidly growing industrial regions of the UK. As Lines and Bolwell (1994, p.53) said, “The new region is a corridor within which new industries are clustered in and around the main towns, such as Swindon and Reading”.

        Opened in December 1971, this region became very attractive to new investments, because of the government policies, such as reducing taxes and improving transport links. The success ...

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