以往探討我國金融發展與經濟成長的文獻,大多僅著重銀行的個別功能,而忽略銀行與股市的互動關係,此外也遺漏金融變數可能存有內生性的問題。本文針對上述兩項特點,以共積模型探討我國銀行發展、股市發展與經濟成長的長期關係及因果關係,並檢測銀行及股市之間究竟為替代抑或互補關係?實證結果顯示銀行發展變數具有弱外生的特性;銀行發展單向峰低股市發展,顯示兩者為替代關係。此外,由長期因果關係檢定可知,我國同時存在供給領導(supply-leading)及需求追隨(demand-following)的股市發展型態,而銀行則為供給領導的發展型態。我們將上述實證結果與現有文獻做一比較。
The paper investigates the long-run relationship between banking development, stock market development, and economic growth using Taiwan's data. A multivariate time-series model is employed to test for cointegration and causal relationship between variables that proxy for above. Cointegration and weak exogeneity tests show the following results: (1) banking development and stock market development significantly promote economic growth; (2) proxy for banking development is weakly exogenous for both stock market development and growth; (3) banking development and stock market development are substitute sources for capital borrowing and lending; (4) banking development causes growth which validates supply-leading hypothesis; and (5) the bidirectional causal relationship between stock market development and economic growth supports both supply-leading and demand-following hypothesis. We also compare the empirical results with related literature.