有別於大多數文獻研究產業地理集中對績效的影響，本文依產 業經濟理論深入的探討產業地理集中與產業結構（市場集中度）的 相關。利用各種不同級別的資料，我們發現產業的地理集中與市場 集中度呈現負向關係；也就是說，產業地理越集中或聚集程度越 高，市場的競爭程度也越高。此外，利用空間相關分析我們觀察 到，地理集中提高週遭區域競爭程度的外部擴散效果。最後，在跨 期資料的分析中，我們發現地理集中程度的變動與市場集中的變動 為負相關；若從產業動態與時間動態的角度來看，則指出大部分新 進廠商會選擇地理集中程度較高的區域，作為其設廠的區位。

Unlike many papers discussing the relationship between industry geographic concentration and performance, we focus on market and geographic concentration. Using three types of 1991 to 2001 census data, we find a negative correlation between market and geographic concentration. Through spatial correlation analysis, this paper also presents the externality effects of geographic concentration that increase the competition among neighborhood regions. Finally, we find that most firms choose to establish in a higher geographic concentration region by simultaneously considering the industry dynamic and time.