本文首創以(國內生產毛額GDP-國民所得NI)之差額的擴大,來衡量國民所得增長的惡化。本文將對台灣國民所得增長的遲緩現象,其與台灣大量引進外勞人口逾30萬,以及其與台灣同時又併存大量失業人口逾50萬等兩個因素之相關性,作實證估計分析。我們發現:台灣在尚未充分就業之前,自1991年以來,即逐年引進大量外勞的政策,以及其所導致的失業率提高現象,皆甚顯著的造成台灣國民所得增長的遲緩。本文指出:台灣在引進外勞後的1991-2006之16年期間,其對提高台灣經濟成長率之效果,並未如產業界與政府所預期的大,反使年平均經濟成長率,由未引進外勞前的1978-1990期間之8.4285%,降至引進外勞後的1991-2006期間之5.3775%。台灣引進外勞後,伴隨經濟成長率力度的減弱,又顯著的造成台灣年平均失業率由1978-1990之1.9462%,提高到1991-2006之3.06%,且居高難降,此復導致台灣國民所得增長之遲緩。
We propose a new indicator, i.e., the widening gap of (GDP-NI) amount, to measure the deterioration of National Income Growth. We find that the massive employment of foreign labor since 1991, which accompanys high rise of unemployment rate, has been leading to the significant deterioration of national income growth in Taiwan.We also find that the economic growth effect driven by employing massive foreign labor since 1991 is not so significant as expected by the industry and by the government during the past 16 years from 1991 to 2006 because both the average economic growth rate and the average unemployment rate deteriorate drastically, comparing to the previous period before 1991 without employing foreign labor.