It is an important and challenging issue to determine an appropriate exhibition price for each item on a second-hand fashion EC (Electronic commerce) site. If an item is not sold for a certain period, it should reduce the price of the item. Because second-hand fashion items have various features such as brand and category, it is not easy to accurately estimate the selling prices of each item that would be accepted by a customer. In this study, we propose a model that analyzes the relationship between the first exhibition price and the actual selling price of an item by analyzing its past sales history data and the results of the price change test in an integrated manner. To obtain a high prediction accuracy, items were clustered based on their characteristics and prediction accuracy, and the result of the price change test was used to verify the response of each customer. Using actual data analysis, we identified the items with a high prediction accuracy and predicted the selling price when the first exhibition price was changed for those items. Furthermore, we analyzed the appropriate setting of the selling price for future.
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