Cities and Affordability

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Above is a map displaying median home prices by city and the salary needed to afford living there. Most of the mid-west and south have affordable housing requiring income’s below the US average. (Currently US average income is around $53,750) The most expensive cities to live in are located in the northeast and in California. Current data indicates that San Francisco is the most expensive city to afford with a needed salary of $147,996. This is followed by San Diego at $103,165, Los Angeles at $95,040, New York at $86,770, Boston at $83,151, Washington DC at $78,626, and Seattle at $78,425.

Gay Marriage Percentage by State

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Above is heat map displaying same-sex marriage as a percent of all marriages in each three-digit zip code area. The darker the color, the higher percentage of same-sex marriages. Below is a bar-chart displaying results at the state level (Only the top 25 states by population are shown). The number displayed is the percentage of same-sex marriages relative to all marriages in the state. Only 7 of the 25 states have a percentage above the national average of 0.35%. They are: Massachusetts, Washington, California, New York, Maryland, Minnesota, and Arizona.

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Tech Job Locations


There are approximately 4 million technology related jobs located in the United States – that number translates to about 2% of the US labor force working in tech. How does that 2% figure compare with tech concentrated cities around the country? The graphic above displays the number of tech jobs per 1000 jobs compared with the annual salary of tech workers. What’s striking at first glance is that not only do tech workers make higher incomes the more tech jobs are concentrated, but they make exponentially higher incomes. This finding seems to indicate that tech workers skill sets compliment each other leading to an exponential increase in each worker’s productivity.

Not surprisingly, Silicon Valley tops the list (by a large margin) in the number of tech jobs per capita by city (or region in this case). Silicon Valley has approximately 13% of it’s workforce working in tech – almost 7 times the US average of just 2%. Further, the next closest city to this figure is San Francisco at 8%, literally the next closest city to Silicon Valley by proximity. SV and SF also lead in annual salaries for tech workers in large cities following the model’s prediction above. Other leading tech concentrations are: Washington D.C. with 7.8% of it’s workforce in tech, Seattle 7.6%, Austin 6.4%, Boston 5.2%, and Denver 4.6%

US State Population Growth

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Above is a graph displaying the five most populous states in the United States from 1900 to 2013. These states – California, Texas, New York, Florida, and Illinois – combine for 119 million people, 37% of US total population.

What’s striking from the graph above is the growth behavior from California, Texas, and Florida compared to New York and Illinois – the latter leveling off and the former having exponential growth. California and New York had the same population in the mid 1950’s, now California is twice as populous as New York.

State population projects are displayed in the table below. California is expected in grow to 44 million people by 2030, Texas to 31 million, and New York to 22 million.

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California Population Map

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Above are two maps displaying California. The one on the left is a ‘normal’ map displaying each county by relative area size and colored by population density – red more dense and green less dense.

The map on the right is distorted relative to population size. What is striking is how much of California’s population is concentrated in the Bay Area and Los Angeles/San Diego. The Central Valley (between SF and LA) and Northern California (above San Francisco) despite their large area, make up a small proportion of California’s total population. For comparison, the Bay Area and Los Angeles/San Diego make up 26 million of California’s 38 million residents.