US economic time series.
This dataset was produced from US economic time series data available from http://research.stlouisfed.org/fred2. economics is in "wide" format, economics_long is in "long" format.
A data frame with 478 rows and 6 variables
Month of data collection
personal savings rate 
personal consumption expenditures, in billions of dollars 
number of unemployed in thousands, 
median duration of unemployment, in week 
total population, in thousands