公共建設投資之產業關聯效果分析

Assessment of the Industrial Linkage Effect of Investment in Public Construction

考量公共建設投資對我國整體經濟有一定程度之影響，本研究首先檢視我國公共投資現況，然後利用產業關聯分析法，分別以開放模型與半封閉模型，評估公共建設投資對經濟之影響。以半封閉模型為例，104年國內公共建設投資編列新台幣2000億元，將帶動GDP增加1.24個百分點（約增加1882.35億元），產值增加5294.17億元，主要受影響的產業為公共工程、商品買賣、鋼鐵、非金屬礦物製品、工商服務等。為增進公共建設投資效應對經濟成長的貢獻，政府必須提高投資效率，透過改善公共建設投資過程，進行嚴格的成本效益分析，以提升基礎設施的投資品質。

Considering that investment in public construction has to a certain extent affected Taiwan's overall economy, this study first examines the current status of investment in public construction in Taiwan, then uses industrial linkage analysis, open model and semi-closed model respectively, to simulate and assess the case of investment in public construction. Taking the semi-closed model as an example, in 2015 if the government budgets NT$ 200 billion for investment in public construction in Taiwan, the GDP will increase by 1.24 percentage pointsan approximate increase of NT$ 188.235 billion. The value of production will increase by NT$ 529.417 billion, and the main affected industries are public works, commodity trading, iron and steel, non-metallic mineral products, and industry and commerce services. To promote the public construction investment returns contributing to economic growth, the government must improve the efficiency of investment by improving the public construction investment process and taking strict cost-benefit analysis, in order to enhance the quality of infrastructure investment