Dataset:   ret_earn.dat
Source: McNair (1930) "Margins, Expenses and Profits in Retail Trade
in the U.S. as Studied by the Harvard University Bureau of Business
Research". The Economic Jounal Vol.40,No.160,pp599-632.

Description: Net Profit or Loss Percentages for 352 Department
Stores with Sales Under $1,000,000 in 1925

Variable/Column
Net earnings Percent  1-6