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Xavier Schepler
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Time series prediction: weekly price of the iPhone 7 on the refurbished market

Started this discussion. Last reply by Xavier Schepler May 1. 2 Replies

Hello,We are trying to predict the weekly price of the iPhone 7 on the refurbished market.We are using an auto-regressive model, which takes as input the weekly price of an iPhone for the last ten…Continue

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Xavier Schepler replied to Xavier Schepler's discussion Time series prediction: weekly price of the iPhone 7 on the refurbished market
"Thanks for your response.  We performed a SVR (Support Vector Regression). Finally we switched to multiple ARIMA models (one for each phone and condition)."
May 1
Xijian Lim replied to Xavier Schepler's discussion Time series prediction: weekly price of the iPhone 7 on the refurbished market
"Wouldn't a regression model be better? Prices would fluctuate between categories eg. wear & tear, refurbished, model etc. and having a regression model would help account for these. You can then plot an average of the prices of models over…"
Apr 23
Xavier Schepler's discussion was featured

Time series prediction: weekly price of the iPhone 7 on the refurbished market

Hello,We are trying to predict the weekly price of the iPhone 7 on the refurbished market.We are using an auto-regressive model, which takes as input the weekly price of an iPhone for the last ten weeks, including the current one, and which products as output the price for the next week.Feeding a SVR with historical data for the iPhone 7 offers a good R2 score in tests.The point is that when we add historical data of other phones such as iPhone 6, iPhone 5s to the training data, we obtain a…See More
Apr 19
Xavier Schepler posted a discussion

Time series prediction: weekly price of the iPhone 7 on the refurbished market

Hello,We are trying to predict the weekly price of the iPhone 7 on the refurbished market.We are using an auto-regressive model, which takes as input the weekly price of an iPhone for the last ten weeks, including the current one, and which products as output the price for the next week.Feeding a SVR with historical data for the iPhone 7 offers a good R2 score in tests.The point is that when we add historical data of other phones such as iPhone 6, iPhone 5s to the training data, we obtain a…See More
Apr 19

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