Michael Porter developed a model that helps identify countries or geographical regions where conditions support its competitiveness globally in a specific industry. As an example, France had historically been a world leader in wine; Italy historically a world leader in shoes; and India currently is a world leader in software development, Each country's leadership was due to strong supporting conditions in the four key factors that Porter identified as critical to regional competitive success. Porters Model identifies four factors that, working together, can result in a regional or world competitive advantage: 1. FACTOR CONDITIONS (skilled labor, land, capital, technology, know-how, and infrastructure); 2. Local DEMAND CONDITIONS (strong local demand with sophisticated and demanding customers); 3. RELATED AND SUPPORTING INDUSTRIES (the extent to which companies' domestic suppliers and other complementary industries are developed and helpful.); 4. RIVALRY, STRATEGY, AND STRUCTURE OF DOMESTIC COMPETITORS (refers to how challenging it is to survive domestic competition-strong competition makes the industry stronger).

In the United States, the geographical region known as Silicon Valley in Northern California has been competitive globally in developing many of today's advanced technologies. Apple, Google, Facebook, Intel, HP, and Oracle are a few of the many successful technology companies in Silicon Valley.

Identify for each of the four key factors in Porters Model for National Competitiveness (Factor Conditions; Local Demand Conditions; Related and Supporting Industries; Rivalry, Strategy, and Structure of Domestic Competitors) conditions that exist in Silicon Valley to support it as a global leader in technology development. Give specifics for each of the four factors. The analysis should answer the question: 'why has Silicon Valley in the US been a dominant world leader in technology development?"