Journal of Korean Society for Quality Management (품질경영학회지)

Korean Society for Quality Management (한국품질경영학회)
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Derivation and utilization of probability distribution of credit card usage behavior

신용카드 이용행태의 확률분포 도출과 활용

  • 이찬경 (홍익대학교 대학원 경영학과) ;
  • 노형봉 (홍익대학교 경영대학)
  • Received : 2018.01.03
  • Accepted : 2018.02.23
  • Published : 2018.03.31
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Abstract

Purpose: To find out the appropriate probability distribution of credit card usage behavior by considering the relationship among income, expenditure and credit card usage amount. Such relationship is enabled by Korea's especially high penetration of credit card. Method: Goodness-of-fit test and effect size statistic W were used to identify the distribution of income and credit card usage amount. A simulation model is introduced to generate the credit card transactions on individual user level. Result: The three data sets for testing had either passed the chi-square test or showed low W values, meaning they follow the exponential distribution. And the exponential distribution turned out to fit the data sets well. The r values were very high. Conclusion: The credit card usage behavior, denoted as the counts of users by usage amount band, follows the exponential distribution. This distribution is easy to manipulate, has a variety of applications and generates important business implications.

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