# RFM aims to answer the following questions:
# 1.) How to segment customers to determine who are more likely to response to ads / to purchase?
# 2.) Which type of customers to send ads in order to breakeven and make profit?
#
# Defn of RFM
# R(ecency): how recently did customer purchase?
# F(rquency): how often do customer purchase?
# M(onetary Value): how much do they spend (each time on average)?
#
# References:
# a.) RFM Step-by-Step {http://www.dataapple.net/?p=84}
# Initialize working directory
dir_Input = "/Users/richleung/Dropbox/Projects/CLV/1_Input/CDNOW"
# Import raw data (69,659 transactions)
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