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The Performance of Seaport Clusters - RePub - Erasmus Universiteit ...

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Chapter 4 – Variables <strong>of</strong> Cluster <strong>Performance</strong> 27<br />

clusters/industries (see Auerbach and Skott, 1995). <strong>The</strong> ‘diamond framework’ shows<br />

variables that influence the competitiveness <strong>of</strong> clusters. Figure 6 shows Porter’s diamond.<br />

Figure 6: Porter’s diamond<br />

Chance<br />

Factor<br />

conditions<br />

Source: Porter, 1990, p.72<br />

Firm strategy,<br />

structure and<br />

rivalry<br />

Related and<br />

supporting<br />

industries<br />

Demand<br />

conditions<br />

Government<br />

<strong>The</strong> diamond consists <strong>of</strong> four elements that are - in Porters view - mutually reinforcing.<br />

Demand conditions influence the development <strong>of</strong> products. Porter argues that a<br />

sophisticated and demanding home market creates good conditions for success abroad.<br />

Critics have argued that Porter overemphasizes the importance <strong>of</strong> the domestic - or home -<br />

market (see Dunning, 1993, pp. 9-10) but the positive influence <strong>of</strong> the presence <strong>of</strong> critical<br />

demand in a location on the attractiveness <strong>of</strong> that location -or cluster- is widely shared.<br />

Factor conditions are related to production factors, such as natural resources, capital and<br />

infrastructure (Porter 1990, p. 73-74). Porter acknowledges the mobility <strong>of</strong> production factors<br />

across locations, but assumes that relative differences in factor availability persist even if<br />

some <strong>of</strong> these factors are mobile. Porter argues that advanced factors have to be improved

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