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OECD Culture and Local Development.pdf - PACA

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Annex 2<br />

CHAPTER 3: PROMOTING LOCAL DEVELOPMENT BY CREATING CULTURAL<br />

PRODUCTS<br />

Identification <strong>and</strong> statistical measurement of cultural <strong>and</strong> creative districts<br />

Annex 2.1 Concentration<br />

It is useful to look next at indicators of concentration, taking the ratio of the<br />

percentage of employment in the given sector to the average percentage of this kind<br />

of employment in the economy. If:<br />

• S is the sector of activity,<br />

• Z is the territory of reference,<br />

• N(S,Z) is the number of jobs or establishments in activity S in territory Z, <strong>and</strong><br />

• N(S) is the total number of jobs or establishments in the activity, then an initial<br />

concentration index is given by:<br />

N(S,Z)/N(S)<br />

This index is not very satisfactory because it does not take into account the<br />

unequal distribution of jobs <strong>and</strong> establishments. We must then st<strong>and</strong>ardise this first<br />

index in order to compare territories, <strong>and</strong> for that we need data on a territory’s relative<br />

share in the economy. If:<br />

• T represents the total number of jobs or establishments in the economy,<br />

• T(Z) represents the total number of jobs or establishments in the territory Z,<br />

then the concentration index is:<br />

[N(S,Z)/N(S)] / [T(Z)/T]<br />

There will be concentration when this index is greater than unity. For a given sector<br />

of activity, that means that the importance of this territory is greater than its weight<br />

in the French economy.<br />

CULTURE AND LOCAL DEVELOPMENT - ISBN 92-64-00990-6 - © <strong>OECD</strong> 2005 183

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