The Clark Sector Model describes an economic theory that divides societies into four sectors of activity: primary (extracting raw materials), secondary (processing raw materials), tertiary (providing services), and quaternary (research and high-level decision making). It was developed in the 1940s to explain industrialization and urbanization. While it can model economic development, it makes outdated assumptions about linear development and does not account for international trade.

1. Clark Sector Model
Stephanie, Joy, Yusuke, Teru

2. What is the Clark Sector Model?
Economic theory/hypothesis that
provides a description of three type
of activities (Primary Sector,
Secondary Sector, Tertiary Sector,
Quaternary/Quinary Sector)
essential to all societies.

3. Primary Activities
Resources extracted from the earth; not processed
Secondary Activities
Processed products from primary, both durable and
nondurable goods, and construction
Tertiary Activities
Provision of services: teachers, nurses, etc.
Quaternary Activities
Research of science and technology /Levels of decision
making for society/economy

7. CaseStudy - US

8. • Able to Explain the process of urbanization,
industrialization
• Economic development of a nation can be
well modelled
• Shows how there is more than one path to
development

9. • Assumption that development is linear
• Developed in 1940's and is outdated
• Only takes into account "MEDC"s (that can have
different sectors. e.g: some countries have
poorer secondary sectors, etc)
• Not valid due to Interdependency - raw
materials usage is not equal and Fair amongst
nations
• Model doesn't include the international
economic context such as imported
manufactured goods

10. " Clark Fisher Model." Slideshare. N.p., n.d. Web. 08 Oct. 2012.
<http://www.slideshare.net/fozzie/clark-fisher-model>.
"Peak Employment." Peak Employment. N.p., n.d. Web. 08 Oct. 2012.
<http://www.streettalklive.com/off-the-street/1028-peak-employment-
.html>.
Seehorn, Ashley. "3 Sector Models of Economics." EHow. Demand Media, 04
Feb. 2011. Web. 08 Oct. 2012. <http://www.ehow.com/info_7894453_3-
sector-models-economics.html>.
"3 Sector Models of Economics." EHow.co.uk. N.p., n.d. Web. 08 Oct. 2012.
<http://www.ehow.co.uk/info_7894453_3-sector-models-
economics.html>.