
戴立安指出沈伯洋支持度逆轉領先,藍營陷入沉默螺旋,選情呈現類似2014年柯文哲效應
民調專家戴立安分析台北市長選情,指出蔣萬安雖穩住深藍基本盤,但淺藍選民流失,沈伯洋支持度逆轉領先。戴立安強調民調反映「洋流效應」,藍白陣營陷入沉默螺旋,目前選情變天訊號強烈。
AI-generated summary
戴立安與信民兩岸研究協會合作,分別於9月及10月發布台北市長民調。民調顯示沈伯洋支持度在一個月內大幅上升,與蔣萬安形成逆轉趨勢。
台北市長選戰備受關注,民調專家戴立安近日接受專訪時直言,台北市變天的訊號已經很強烈,雖然蔣萬安保住了深藍基本盤,但淺藍族群確實正在跑票。
過去所做之民調口碑深受肯定的戴立安,與信民兩岸研究協會合作,分別於9月22日及10月20日釋出台北市長民調,前者顯示蔣萬安支持度(41.7%)僅領先沈伯洋(40.5%)1.2個百分點,後者才經過短短一個月就出現劇烈消長,變成沈伯洋(50.3%)逆轉領先蔣萬安(33.3%)17個百分點。這讓大批藍營支持者超崩潰,誣指戴立安收綠營的錢做假民調。
上週五(10/30),戴立安上資深媒體人黃光芹主持的《觀點芹爆戰》接受專訪,表示他做的最新民調顯示沈伯洋不僅逆轉還大勝蔣萬安,是因為「洋流效應」非常熱,綠營支持者表態意願極高,9月份做的民調就能看到民眾表態率約為8成多,到了10月又上升至9成,尤其是年輕選民,這種現象類似2014柯文哲選台北市長、2018年韓國瑜選高雄市長,及2020年蔡英文爭取連任總統時的選情熱度。相較之下,藍白陣營則陷入「沉默螺旋」,導致受訪樣本的表態出現顯著落差。
針對外界質疑民調數據,戴立安並未理會惡意抹黑,強調他的民調數據皆有所本,僅進行人口統計加權,絕不做政黨加權,否則會扭曲民眾的真實態度。不過在進行「投票預測」時,則必須將過去10至15年的投票紀錄以及拒訪者的態度一併納入模型計算。以10月份台北市的估算結果為例,在不同投票率的情境下,選算落點落在「蔣萬安可能勝出0.7%」至「沈伯洋可能勝出6%」之間。
「中間藍、淺藍 跑掉近7個百分點」
戴立安直言,雖然蔣萬安仍穩住深藍基本盤,但「已經在掉票了」,中間藍與淺藍選民中,約跑掉了6%至7%,部分轉向沈伯洋。整體消長下,沈伯洋支持度約增加8.5%,蔣萬安則下滑8.5%,差距拉到17%。目前台北市的藍綠政治板塊已不再是傳統的「六四比」,雖然蔣萬安仍有勝算,但翻盤的訊號十分強烈。他舉2018年高雄選情為例,當時8月即出現綠營支持度高但「希望換黨做做看」數據更高的異常訊號,到了10月韓國瑜便實現逆轉。當前台北市的政經背景與民氣,同樣展現出強烈的變天趨勢。
他還說,「洋流效應」早已外溢到其他縣市,他在調查六都「希望由哪一黨執政」時發現,國民黨僅在桃園保持領先;而在台中市,希望由民進黨執政的比例竟超越國民黨,此結果令他「心頭一震」,近期也將對外發布台中民調。
值得一提的是,這場專訪發生在台北市長選戰電視辯論(10/31)前一天,許多人都非常期待辯論後選情是否會進一步發生變化,但戴立安表示,不用特別期待辯論會帶來什麼效果,歷來辯論效果大概就撐個2、3天,最後都還是要回歸到市政上。
文中提及9月22日公布的民調,由信民協會委託戴立安負責問卷設計與分析、畢肯市場研究公司執行電訪,調查時間從9月16日至18日,調查對象為台北市選民,成功完訪1076人(住宅電話752人、行動電話324人),抽樣誤差最大值為±3.0%;10月20日公布的民調發起機構同上,調查時間從10月14日至10月16日,調查對象同上,成功完訪1075人(住宅電話753人、行動電話322人),抽樣誤差最大值為±3.0%。
AI outlook — possibilities, not facts
台中市選情民調將對外發布
Very likely · Within weeks

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