近年來，綠色供應鏈不斷的被廣泛討論，而信用交易也是現今常見的商業行為。但是綠色供應鏈與信用交易卻很少被一起考慮過。此篇研究在探討應用在報童模式的碳排放與信用交易。而此篇第一個模型的目的在於為了獲得最大利潤條件下，決定最佳訂購量以及最佳信用期限。我們考慮了三種不同的碳排放1.碳稅2.碳額度3.碳交易。為了避免壞帳的產生，我們加上了風險水準來限制我們的違約風險。然後我們延伸了第一個模型，考慮了回收。而第二個模型的目的在於決定最佳訂購量以及最佳信用期限與最佳的回收價格。每個模型在利潤與決策下，我們針對參數對於模型之影響以及過程使用數值例子與敏感度。

ABSTRACT
Recently, green supply chain has been discussed worldwide. Trade credit is also common in modern business. But most of the previous research didn’t discuss green supply chain with the consideration of trade credit. In the beginning, this paper developed the newsvendor models applied to carbon emissions and trade credit. The objective of the first model is to determine the optimal ordering quantity and credit period to maximize total profit. We consider three types of carbon emission incentives: (1) carbon tax (2) carbon cap (3) carbon cap and trade, and we incorporate risk-management methods to limit the rate of default risk. Then we extend the first model with recycling. The objective of the second model is to determine the optimal order quantity, credit period and recycle price. For each model, numerical examples and sensitivity analysis are provided to show the solution procedure and the influences of the model parameters on profit and decisions.

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