從1990開始，許多國家都面臨了薪資停滯的問題，過去也有許多文章針對此議題去探討。相較於台灣，日本及韓國的薪資停滯研究較少，也尚未有利用勞動生產力的變化去探討薪資停滯的研究。因此我們將利用勞動生產力的角度去探討哪些因素是造成台灣、日本及韓國薪資停滯的原因。
本篇文章將控制因採用不同平減指數所導致的薪資脫鉤問題。先藉由結構性斷裂找出各個產業實質薪資的斷點來找到薪資成長趨緩及停滯的時間點，再利用共整合觀察三個國家各產業薪資與勞動生產力間長期均衡關係。最後拆解三國各產業勞動生產力去觀察薪資停滯的時間中，是哪些因素導致了勞動生產力成長的下降及薪資成長的趨緩及停滯。
研究觀察到台灣及日本受到總要素生產力的影響，導致了薪資成長的停滯。韓國的產業則受資本份額及資本密集度影響，導致了薪資成長的趨緩。但韓國由於總要素生產力在薪資趨緩時呈現正成長，導致韓國的薪資停滯問題較不嚴重。因此本研究認為總要素生產力是影響薪資最重要的因素，政府若要解決薪資停滯的問題可以由總要素生產力下手。

Since 1990, many countries have faced the problem of wage stagnation, and much research has focused on the causes of wage stagnation. However, little research has been conducted to explore the causes of wage stagnation from the perspective of labor productivity. To further investigate what caused wage stagnation from a different perspective, Taiwan, Japan, and South Korea were chosen as research objects because of their geographical proximity and industrial similarity.
This thesis dealt with the problem of wage decoupling caused by using different deflators. First, the breakpoints of wages in each activity were found by using a structural break to find the time of wage stagnation. After that, the co-integration was used to observe the long-term equilibrium relation between wages and labor productivity in each activity in these three countries. Lastly, we decoupled the labor productivity into three factors: total factor productivity, capital share, and capital intensity to observe what factors caused the decline in labor productivity growth and wage stagnation.

From our observations, the labor productivity of Taiwan and Japan are most affected by total factor productivity, while the labor productivity of South Korea is most affected by capital share and capital intensity.
Compared to Taiwan and Japan, the wage stagnation problem in South Korea is less severe because of the growth in total factor productivity. The results reveal that total factor productivity is the most important factor affecting wage growth. The government might start with enhancing total factor productivity to solve wage stagnation.

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