請用此 Handle URI 來引用此文件：
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/93422完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 黃景沂 | zh_TW |
| dc.contributor.advisor | Ching-I Huang | en |
| dc.contributor.author | 何翰東 | zh_TW |
| dc.contributor.author | Han-Ton Ho | en |
| dc.date.accessioned | 2024-07-31T16:14:58Z | - |
| dc.date.available | 2024-08-01 | - |
| dc.date.copyright | 2024-07-31 | - |
| dc.date.issued | 2024 | - |
| dc.date.submitted | 2024-07-27 | - |
| dc.identifier.citation | Addona, V. and Roth, J. (2010). Quantifying the effect of performance-enhancing drug use on fastball velocity in major league baseball. Journal of Quantitative Analysis in Sports, 6:6–6.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/93422 | - |
| dc.description.abstract | 2023 賽季，大聯盟實施了近年來最重大的規則變更，包括增設投手計時器、限制防守佈陣和加大壘包尺寸等。除了基於商業考量提升比賽觀賞性外，這些變 更的主要目的是改善近年來投手相對於打者更具優勢的局面。本文著重於探討限 制守備佈陣政策實施後對大聯盟打者表現的影響。
首先探討限制守備佈陣對大聯盟打者整體的影響。結果顯示，左打者和左右 開弓型打者在政策實施後的打擊率均有所上升，說明限制守備佈陣政策有效地減 輕了這兩類打者在打擊時面對的防守壓力。 隨後，本文進一步探討了政策效果的異質性。我們從多個打者的擊球特徵中 找出受影響幅度最大的類型，結果發現，內野安打率高、內野飛球率低、拉打比 率高、強擊球百分比高的打者在政策實施後的打擊率提升更大。說明即使所有打 者受到相同的政策影響，由於打者的習慣和擅長的擊球方式不同，他們對政策的 反應存在差異。 | zh_TW |
| dc.description.abstract | In the 2023 season, Major League Baseball introduced significant rule changes, including a pitch clock, restrictions on defensive shifts, and larger bases. These changes aimed to enhance game viewership and counteract the recent dominance of pitchers over hitters. This study examines the impact of defensive shift restrictions on MLB hitters.
Overall, the restrictions led to increased batting averages for left-handed and switch- hitters, indicating reduced defensive pressure on these hitters. Further analysis revealed that hitters with high infield hit rates, low infield fly ball rates, high pull rates, and high hard-hit percentages saw the most significant improvements in their batting averages. This suggests that the policy’s impact varies based on individual hitting styles and strengths | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-07-31T16:14:58Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-07-31T16:14:58Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 口試委員審定書i
摘要ii Abstract iii 目錄iv 圖目錄vi 表目錄vii 第一章緒論1 第二章文獻探討5 2.1 大聯盟研究綜述. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 機器學習方法於棒球中的應用. . . . . . . . . . . . . . . . . . . . . 6 2.3 因果森林模型. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3.1 異質性處理效果. . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3.2 因果樹. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3.3 因果森林. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 第三章資料說明與敘述統計11 3.1 資料來源. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2 敘述統計. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 第四章實證模型與結果16 4.1 限制守備布陣的整體影響. . . . . . . . . . . . . . . . . . . . . . . . 16 4.1.1 簡介. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.1.2 平行趨勢驗證. . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.1.3 模型. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.1.4 結果分析. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.1.5 穩健性測試. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.1.5.1 隊伍. . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.1.5.2 是否為新秀. . . . . . . . . . . . . . . . . . . . . . . 22 4.1.5.3 是否為自由球員. . . . . . . . . . . . . . . . . . . . 23 4.1.5.4 是否入選全明星. . . . . . . . . . . . . . . . . . . . 23 4.1.5.5 以低佈陣率打者為對照組. . . . . . . . . . . . . . . 25 4.2 守備布陣限制對不同打者類型的影響. . . . . . . . . . . . . . . . . 26 4.2.1 內野安打率. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.2.2 內野飛球率. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 4.2.3 拉打比率. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.2.4 強擊球百分比. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.3 藉因果森林挖掘打者特徵. . . . . . . . . . . . . . . . . . . . . . . . 31 4.3.1 簡介與實證設定. . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.3.2 結果. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 第五章結論35 5.1 實證結果. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.2 後續影響分析. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 參考文獻38 | - |
| dc.language.iso | zh_TW | - |
| dc.subject | 大聯盟 | zh_TW |
| dc.subject | 限制守備佈陣 | zh_TW |
| dc.subject | 打擊率 | zh_TW |
| dc.subject | 異質性處理效果 | zh_TW |
| dc.subject | 差異中之差異法 | zh_TW |
| dc.subject | Difference-in-Differences method | en |
| dc.subject | MLB | en |
| dc.subject | Defensive Shift Limits | en |
| dc.subject | Batting average | en |
| dc.subject | Conditional Average Treat- ment Effect (CATE) | en |
| dc.title | 2023 大聯盟政策之影響探討 | zh_TW |
| dc.title | The Impact of 2023 Major League Baseball Policies | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 112-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 楊睿中;朱建達 | zh_TW |
| dc.contributor.oralexamcommittee | Jui-Chung Yang;Jian-Da Zhu | en |
| dc.subject.keyword | 大聯盟,限制守備佈陣,打擊率,異質性處理效果,差異中之差異法, | zh_TW |
| dc.subject.keyword | MLB,Defensive Shift Limits,Batting average,Conditional Average Treat- ment Effect (CATE),Difference-in-Differences method, | en |
| dc.relation.page | 40 | - |
| dc.identifier.doi | 10.6342/NTU202402247 | - |
| dc.rights.note | 未授權 | - |
| dc.date.accepted | 2024-07-30 | - |
| dc.contributor.author-college | 社會科學院 | - |
| dc.contributor.author-dept | 經濟學系 | - |
| 顯示於系所單位： | 經濟學系 | |
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