Economic Data
A few examples of what you can ask Wolfram|Alpha about:
compare economic data for the US
get economic data for a US state
get economic information about the world
compare economic data for a country group
compare economic data for multiple countries
get salary data for a given occupation
do computations with salary figures
Wealth Distribution
get information about wealth distribution per country
compare poverty statistics between countries
get unemployment data for a US state
compare unemployment in several US cities
get cost of living indices for a city
compute a cost of living comparison
get data on meat production in a given country
get livestock population data
get home value data
compare house prices in several cities
get an overview of health care costs in a country
get details of health care costs
get trade statistics
do computations with trade statistics
get telecommunications data for a country
get data for a class of countries