Primary Sector
- The direct extraction of renewable and non-renewable sources from the Earth by way of agriculture, mining, fishing, etc.

- Typically found in LDC’s as the main industry for people to work in and results in monoeconomies and usually uneven development that hinder states from developing and industrializing. The percentage of people working in agriculture

exceeds 60 % in LDCs, compared with less than 5 % in MDCs.

--Example: Nga Trang, Vietnam has fishing as the main source of income and the most abundant job in the area.

- Industries in this category tend to be located close to the materials that are grown so as to lower cost and ease access to resources.

-The jobs are usually labor intensive and require little to no specialized skills or education.

- The sector jobs come about since the first priority for these people is to secure food for survival.

-A high percentage of agricultural workers in a country indicates
that most of its people must spend their days producing food for their own survival.

- The number of jobs in this sector is decreasing as a result of increased technology and development.

Secondary Sector

- Manufacturing jobs where the raw materials taken from the 1st sector workers are processed and assembled. Jobs include public works, construction, and utilities.

- While these jobs were traditionally found in MDC’s of the midlatitudes, transnational corporations have changed this.

- Example: manufacturing that occupies the central core of Europe surrounded by a less industrialized periphery.

-Some secondary-sector plants locate close to each other to gain the advantages of agglomeration and the multiplier effect, both of which enhance the productivity of clustered firms. An example of this is maquiladoras in Mexico and how they were placed near the U.S. border so that parts are shipped into Mexico and the finished product is shipped back across the border.

-The Industrial Revolution was the start of this job sector and made possible increased manufacturing jobs.

-Today the manufacturing remaining in core countries mainly requires a highly skilled work force so Blue-collar work force has proven largely unable to acquire needed new skills, and High-tech manufacturers employ far fewer workers than former heavy industries.

Tertiary Sector
- Also known as the service industry or the post-industrial phase, this sector involves the provision of goods and services to people in exchange for payment. It can be divided up into 3 parts:

- The 1st part includes retail, plumbing, etc, a large part of this involves the processing and transmission of information. Nearly ½ of all jobs in the US are in consumer services.

- The second part deals with services for businesses such as banking, insurance, advertising, etc. This is the management of information to make decisions or to help others to make decisions through consulting, usually found in post-industrial societies. It involves multiplier leakage, where global corporations invest in secondary industry in the peripheries, but profits flow back to the core. In the US, ¼ of all jobs are in this area.

- The last part deals with research in education, technology, and more that require college level education and beyond.

- They can all be under one sector since all are service jobs, but they can also fall into different categories.

-Example: Hong Kong, China which has several post-industrial features, including the architecture and technology in the area.

- Most services are clustered in urban areas where potential consumers are plentiful. CBD, suburbia and Edge Cities are part of this.

-This is the white collar sector with middle and top management positions in business and industry and require specialized skills.

- The increase in the job sector came with deindustrialization such as with Chicago which no longer has the multitude of factories at its center.

Workforces change as countries develop. They go through several phases (not related to demo trans or other models)

Workforce quotas of the first phase:
Primary sector: 70%
Secondary sector: 20%
Tertiary sector: 10%
An LDC would be in the first phase of the workforce meaning that the society is not yet very scientifically developed and uses little machinery. An example of a country like this would be Europe in the Middle Ages or today’s developing country.

Workforce quotas of the second phase:
Primary sector: 20%
Secondary sector: 50%
Tertiary sector: 30%
The use of machinery becomes intensified in this phase. More machinery is used in the primary sector which results in less necessary workers in the primary sector. The demand for machinery increase, though, and the second sector increases.

Workforce quotas of the third phase:
Primary sector: 10%
Secondary sector: 20%
Tertiary sector: 70%
Automation increases in the first and second sector, which reduces the demand for more industrial production, so the numbers of workers in the primary and secondary sector jobs fall. As this occurs, the numbers rise in the tertiary sector to meet growing demands.