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

Chapter 8 – Clustering in Seaports 93
raw materials and are somewhat concentrated in port regions (a localization share of 1.4 is
taken as minimum) are included in the port cluster. Trade activities for commodities handled
and stored in ports are included when the localization quotient is more than 1.4 as well.
Activities in manufacturing and trade that are not concentrated in port regions are not
included in the port cluster, unless there is a convincing reason for including them. Table 22
shows the localization quotients of some activities that are not included in the port cluster.
Table 22: Localization quotient of some manufacturing activities not included in the port cluster (2002)
Manufacturing
Trade
NAICS
code
Activity Localization
quotient
3259 Other Chemical Product and Preparation Manufacturing 1.3
3312 Steel Product Manufacturing from Purchased Steel 1.3
3255 Paint, Coating, and Adhesive Manufacturing 1.2
234 Heavy Construction 1.1
22111 Electric Power Generation 1.1
3313 Aluminium Production and Processing 0.9
33611 Automobile and Light Duty Motor Vehicle Manufacturing 0.8
3315 Foundries 0.8
3254 Pharmaceutical and Medicine Manufacturing 0.8
3361 Motor Vehicle Manufacturing 0.7
52313 Commodity Contracts Dealing
52314 Commodity Contracts Brokerage 0.6
Source: United States Bureau of Census (2003)
With regard to associations, regional ‘horizontal’ business associations for instance for cargo
handling, forwarding, and transport are frequently present in seaports. Apart from those
industry associations, port marketing and promotion associations (see Van Klink and Van
Winden, 1999) and port cluster associations exists in some seaports.
Public-private organizations strongly linked to the core of the cluster and thus included in the
cluster population include innovation centers, and labor pools. Public organizations included
0.7