土豆的力量：土豆引種、人口增長和城市化（QJE2011）
題目：THE POTATO’S CONTRIBUTION TO POPULATION AND URBANIZATION: EVIDENCE FROM A HISTORICAL EXPERIMENT（土豆的力量：土豆引種、人口增長和城市化）
摘要：We exploit regional variation in suitability for cultivating potatoes, together with time variation arising from their introduction to the Old World from the Americas, to estimate the impact of potatoes on Old World population and urbanization. Our results show that the introduction of the potato was responsible for a significant portion of the increase in population and urbanization observed during the eighteenth and nineteenth centuries. According to our most conservative estimates, the introduction of the potato accounts for approximately one-quarter of the growth in Old World population and urbanization between 1700 and 1900. Additional evidence from within-country comparisons of city populations and adult heights also confirms the cross-country findings
研究問題：土豆的引種對于舊大陸人口增長和城市化進程的影響效應
研究動機：土豆這種新大陸作物引種對舊大陸人口增長的影響有很多定性的討論，但由于內(nèi)生性干擾導致相關定量研究難以開展，所以缺乏定量證據(jù)。（Despite qualitative accounts of the benefits of the potato to theOld World, empirical evidence quantifying the overall impact of thepotatois scarce.）
研究設計：以1700年為引種分割時點構建Post，以各國家適宜種植土豆面積這一連續(xù)變量為處理強度，構建DID
研究貢獻：為土豆引種與人口增長和城市化進程提供定量證據(jù)，檢驗了農(nóng)業(yè)生產(chǎn)力提升與經(jīng)濟增長的關系
特別的點：對于本文方法的詳細討論和基準回歸之前的靈活估計，滾動回歸
相關視頻：
土豆的力量：穩(wěn)健性結(jié)果Stata復現(xiàn)
注：個人翻譯和解讀，可能存在疏漏和錯誤,僅供參考(20220414)。
