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標題:可計算一般均衡模型應用於競爭政策之可行性研究
學年92
學期1
發表日期2003/12/01
作品名稱可計算一般均衡模型應用於競爭政策之可行性研究
作品名稱(其他語言)
著者李秉正; 徐世勳; 林國榮; 楊浩彥
作品所屬單位淡江大學產業經濟學系
出版者臺北市行政院公平交易委員會
會議名稱第十一屆競爭政策與公平交易法學術研討會
會議地點臺北市, 臺灣
摘要本計畫主要的研究目的,在於建立並運用可計算一般均衡模型(computable general
叩ilibrium, CGE, model)以評估競爭政策( competition policy )對台灣總體經濟與產業經濟的
影響。在研究當中,我們首先建立了一個完全競爭市場結構的CGE 基本模型,其次,考慮
我國經濟體存在不完全競爭市場結構的事實,參考Abayasiri-Silva and Horridge (1 997,
1999) ,架構出另一個不完全競爭市場結構的CGE 模型。在短期的情境下,廠商的個數固定,
可能存在有淨利潤的現象; 而在長期的情境下,由於廠商的自由進出(廠商的個數為內生
變數) ,淨利潤將不存在。在模型中,規模報酬分成廠商層級與產業層級兩種情況來探討,
而廠商的定價法則分完全競爭、獨占競爭、及Harris 主觀設定等法則加以分析。
我們運用所建立的CGE 模型,以油品上游市場自由化為例,來測試模型在評估競爭政
策時的能力。研究結果顯示油品上游市場自由化的確對我國總體經濟與石油煉製業的效率提升,產生了相當重要的幫助,不論是哪一種情境設定所產生的模擬結果都是正面的效益。
此結果顯示出公平交易委員會所執行的競爭政策的確對台灣的經濟發展產生了重要的貢
獻。
經由模型測試結果反應, CGE 模型對於回答大型且較全面性的競爭政策問題是有其適
用性。然而在回答公平會一般性的業務執掌問題(如個別廠商的合併案申請)時,雖然就
CGE 模型的運作原理而言也相當適合,但因投入產出細部資料的取得不易,其應用上仍有
所侷限。The purpose of this study is to evaluate the impacts on Taiwan's macro-economy and major
industries of competition policy using computable general equilibrium (CGE) analysis. Firstly, we
establish a Taiwan CGE model (base model) with the assumption of perfect competition. Next,
following Abayasiri-Silva and Horridge (1997,1999) we incorporate the assumption of incomplete
competition into the base model. In the short run, the number of firms is fixed and pure profit may
exist. However, in the long run pure profit does not exit due to free entry and exit. In this scenario
the number of the firms is an endogenous variable. Firm-level and industry-level returns to scale
are investigated. To allow the existence of pure profit we assume different pricing rules for firms.
Three pricing rules are considered. They are competitive pricing rule, monopolistic pricing rule
and Harris pricing rule.
We take upstream gasoline product market liberalization as an example to investigate the
impacts of competition policy using our computable general equilibrium model. Simulation results
show that upstream gasoline product market liberalization has brought significant benefits to
Taiwan's economy and petroleum refinery industry under all kinds of scenarios as stated above.
This implies that results of competition policy administered by the Fair Trade Commission should
be well acknowledged.
Our study demonstrated that computable general analysis is very useful for economy-wide
impacts analysis of competition policy. However, CGE analysis may not be suitable for
micro-analysis, for example, impacts analysis of merger of two firms due to the lack of
disaggregated input-output tables compiled by the Directorate-General of Budget, Accounting and
Statistics (DGBAS).;The purpose of this study is to evaluate the impacts on Taiwan's macro-economy and major
industries of competition policy using computable general equilibrium (CGE) analysis. Firstly, we
establish a Taiwan CGE model (base model) with the assumption of perfect competition. Next,
following Abayasiri-Silva and Horridge (1997, 1999) we incorporate the assumption of incomplete
competition into the base model. In the short run, the number of firms is fixed and pure profit may
exist. However, in the long run pure profit does not exit due to free entry and exit. In this scenario
the number of the firms is an endogenous variable. Firm-level and industry-level returns to scale
are investigated. To allow the existence of pure profit we assume different pricing rules for firms.
Three pricing rules are considered. They are competitive pricing rule, monopolistic pricing rule
and Harris pricing rule.
We take upstream gasoline product market liberalization as an example to investigate the
impacts of competition policy using our computable general equilibrium model. Simulation results
show that upstream gasoline product market liberalization has brought significant benefits to
Taiwan's economy and petroleum refinery industry under all kinds of scenarios as stated above.
This implies that results of competition policy administered by the Fair Trade Commission should
be well acknowledged.
Our study demonstrated that computable general analysis is very useful for economy-wide
impacts analysis of competition policy. However, CGE analysis may not be suitable for
micro-analysis, for example, impacts analysis of merger of two firms due to the lack of
disaggregated input-output tables compiled by the Directorate-General of Budget, Accounting and
Statistics (DGBAS).
關鍵字競爭政策;可計算一般均衡分析;油品自由化;Competition policy;computable general equilibrium analysis;gasoline products market liberalization
語言中文
收錄於
會議性質國內
校內研討會地點
研討會時間20031201~20031202
通訊作者李秉正
國別中華民國
公開徵稿
出版型式
出處第十一屆競爭政策與公平交易法學術研討會論文集頁359-409
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