A long time ago I surfed the web and I look a piece of information about the inventors of dummy variables. I recall they were two american economists (father and son). I have tried to find that particular webpage but without any success. Do you know who invented the dummy variables as we use it in econometric and statistical models today? Can any of you provide a web address with that particular piece of information? Thanks in advance to everyone!
The inventor of dummy variables was George Boole in mid XIX century. On his book "An investigation of the laws of thought: on which are founded the mathematical theories of logic and probabilities" published on 1854 he proposes 0 and 1 as a mean to represent a class. You can look at his fascinating work on page 47 of his book on this link. http://www.archive.org/stream/investigationofl00boolrich#page/46/mode/2up