Tung also says that the computable general equilibria produced by research institutions all show varying degrees of negative impact on Taiwanese GDP if Taiwan is unable to join ASEAN Plus. But the forecasts produced by the models must be verified after the fact by comparison to the actual data if they are to be granted much credence.
童振源表示，台灣若無法參與「東協加 N」，研究機構的模擬預估 (CGE) 都顯示對 GDP 有程度不等的負面衝擊；但這些數字必須參照事後實際數據分析（重力分析），才較具可信度。