SEE ALSO: Market Sizing Techniques and Practice Problems

For market sizing interview questions, you’ll be more effective if you memorized a list of common assumptions. It’ll save you from asking the interviewer for basic assumptions. Candidates that ask for simple assumptions such as “What’s the US population?” will come across as unprepared.

To make it easier for you, I’ve included both the image form (that you can print) as well as text form (that you can cut-and-paste into a cheat sheet).

Market Sizing Numbers to Know

Source: Interview Math: 60+ Problems and Solutions for Quant Case Interviews

Population Assumptions for the United States

United States 319M
New York City 8.4M
Los Angeles 3.9M
Chicago 2.7M
San Francisco 806K
Seattle 687K

Population Assumptions for Outside the United States

World 7.4B
Europe 739M
Asia 4.4B
South America 423M
Africa 1.2B
China 1.4B
India 1.3B
Japan 126M
UK 65M

Other Useful Assumptions for the United States

Life Expectancy 80 years
People per Household 2.5 people
Median Household Income $53K
GDP $16.8 T
GDP Growth Rate 2%
Corporate Tax Rate 35%
Smartphone Penetration 70%
Percent with Bachelor’s Degree 30%
Percent Married Adults 52%
Percent Under the Age of 18 23%
Percent Over the Age of 65 13%

SEE ALSO: Market Sizing Approaches and Practice Problems