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        中國省際環(huán)境全要素生產(chǎn)率及其影響因素分析

        2014-10-17 09:16:19李小勝余芝雅安慶賢
        中國人口·資源與環(huán)境 2014年10期

        李小勝+余芝雅+安慶賢

        摘要

        改革開放以來中國經(jīng)濟(jì)取得到了快速發(fā)展,但與此同時,我國很多環(huán)境污染指標(biāo)在世界排名也顯著提高。那么中國的經(jīng)濟(jì)增長是否是造成環(huán)境污染的原因?經(jīng)濟(jì)增長對環(huán)境一定是有害的嗎?也就是環(huán)境庫茲涅茨曲線在中國是否存在?圍繞著這些問題國內(nèi)外學(xué)者進(jìn)行了大量有益的探討。但是很多文獻(xiàn)都是利用人均收入和人均排放關(guān)系來識別是否存在環(huán)境庫茲涅茨曲線。這種方法的缺點是沒有認(rèn)清這兩者都是生產(chǎn)過程的產(chǎn)出,是生產(chǎn)過程中的投入導(dǎo)致產(chǎn)出的結(jié)果。忽略生產(chǎn)過程中的投入和產(chǎn)出組合的效率變化,只研究兩個產(chǎn)出之間的關(guān)系會影響傳統(tǒng)的環(huán)境庫茲涅茨曲線檢驗基礎(chǔ),也妨礙環(huán)境效率影響因素的識別。正是循著這個方向,很多學(xué)者構(gòu)建了一個綜合的環(huán)境績效指標(biāo)。通過研究環(huán)境績效指標(biāo)與人均收入之間的關(guān)系來識別是否存在環(huán)境庫茲涅茨曲線?;诖?,本文利用中國30個省份1997-2011年經(jīng)濟(jì)增長和污染排放數(shù)據(jù),利用考慮環(huán)境的數(shù)據(jù)包絡(luò)模型研究了環(huán)境全要素生產(chǎn)率指數(shù)及其分解。研究發(fā)現(xiàn):考慮環(huán)境因素的全要素生產(chǎn)率指數(shù)年均增長2.94%,環(huán)境全要素生產(chǎn)率指數(shù)的增長主要來自技術(shù)進(jìn)步指數(shù)。影響環(huán)境全要素生產(chǎn)率指數(shù)的空間面板Tobit回歸模型表明,人均收入對環(huán)境全要素生產(chǎn)率增長產(chǎn)生正向的作用,這表明經(jīng)濟(jì)發(fā)展水平越高,經(jīng)濟(jì)與環(huán)境的協(xié)調(diào)性越好。人均收入的平方項系數(shù)為負(fù),表明環(huán)境全要素生產(chǎn)率的庫茲涅茨曲線存在。對外開放水平高導(dǎo)致環(huán)境全要素生產(chǎn)率的下降。技術(shù)進(jìn)步始終是環(huán)境全要素生產(chǎn)率增長的積極原因。

        關(guān)鍵詞 距離函數(shù);環(huán)境全要素生產(chǎn)率;空間面板Tobit回歸

        中圖分類號 F124 文獻(xiàn)標(biāo)識碼 A 文章編號 1002-2104(2014)10-0017-07 doi:10.3969/j.issn.1002-2104.2014.10.004

        改革開放以來我國經(jīng)濟(jì)取得到了快速發(fā)展,按照可比價計算1978-2011年我國經(jīng)濟(jì)年均增長速度達(dá)到9.7%,2010年中國經(jīng)濟(jì)取代日本成為世界上第二大經(jīng)濟(jì)體。但與此同時,我國很多環(huán)境污染指標(biāo)在世界排名也顯著提高。目前中國的多個城市環(huán)境污染在世界的排名都是靠前的。在人均收入取得較快速度增長的同時人們對環(huán)境的要求隨之越來越高,國際社會對中國的環(huán)境指責(zé)和準(zhǔn)備針對中國出口產(chǎn)品征收環(huán)境稅等要求日益增多。那么中國的經(jīng)濟(jì)增長是否是造成環(huán)境污染的原因?經(jīng)濟(jì)增長對環(huán)境一定是有害的嗎?也就是環(huán)境庫茲涅茨曲線在中國是否存在?圍繞著這些問題國內(nèi)外學(xué)者進(jìn)行了大量有益的探討。

        Grossman和Krueger[1]研究了北美貿(mào)易協(xié)定對環(huán)境的影響,他們發(fā)現(xiàn)多種污染物與人均收入之間存在一種倒“U”型關(guān)系。幾乎同時Panayotou等[2]人也得到了類似的結(jié)果,并且Panayotou首次將這種倒“U”型關(guān)系稱之為環(huán)境庫茲涅茨曲線。隨后很多學(xué)者對不同國家的環(huán)境污染指標(biāo)與經(jīng)濟(jì)增長進(jìn)行計量檢驗,得到的結(jié)論幾乎是喜憂參半,一部分學(xué)者支持環(huán)境庫茲涅茨曲線存在,另一部分學(xué)者不支持環(huán)境庫茲涅茨曲線的結(jié)論。同樣,國內(nèi)很多學(xué)者對特定的環(huán)境污染指標(biāo)與經(jīng)濟(jì)增長之間的關(guān)系,利用不同的計量方法設(shè)定后進(jìn)行檢驗,如包群等[3]、蔡昉等[4]、李小勝等[5],他們得到的結(jié)論和國外的研究結(jié)論是基本一致的。Jobert等[6]認(rèn)為環(huán)境污染指標(biāo)與經(jīng)濟(jì)增長指標(biāo)之間的關(guān)系如何,這主要受到污染指標(biāo)的選取、解釋變量的選取、數(shù)據(jù)處理、計量方法選擇和函數(shù)的形式設(shè)定等不同而不同。目前這一觀點基本受到了認(rèn)可。

        但遺憾的是,上述文獻(xiàn)都是利用人均收入和人均排放關(guān)系來識別是否存在環(huán)境庫茲涅茨曲線。這種方法的缺點是沒有認(rèn)清這兩者都是生產(chǎn)過程的產(chǎn)出,是生產(chǎn)過程中的投入組合導(dǎo)致產(chǎn)出的結(jié)果。忽略生產(chǎn)過程中的投入和產(chǎn)出組合的效率變化,只研究兩個產(chǎn)出之間的關(guān)系會影響傳統(tǒng)的環(huán)境庫茲涅茨曲線檢驗基礎(chǔ),也妨礙環(huán)境效率影響因素的識別[7]。正是循著這個方向,很多學(xué)者構(gòu)建了一個綜合的環(huán)境績效指標(biāo)。Zaim和Taskin[7]采用雙曲線型的效率測度方法,對OECD國家的環(huán)境效率進(jìn)行測量。Zhou等[8] 基于環(huán)境生產(chǎn)技術(shù)構(gòu)建了環(huán)境導(dǎo)向的距離函數(shù),研究了1997-2004年世界前18個碳排放大國的CO2排放全要素生產(chǎn)率,并利用DEA技術(shù)從“多投入和多產(chǎn)出”的角度研究環(huán)境效率,這種方法比傳統(tǒng)的利用“單投入單產(chǎn)出”更加全面和客觀[8]。國內(nèi)王群偉等[9]采用與Zhou等[8]相同的方法構(gòu)造環(huán)境效率指數(shù),并且利用面板回歸和面板協(xié)整模型分析了環(huán)境效率的影響因素。

        上述的文獻(xiàn)都注意到應(yīng)用全要素的角度來度量環(huán)境效率,但是有些研究中沒有考慮能源投入問題,實際上很多污染指標(biāo)是與能源使用有一定的關(guān)系。其次,很多研究中的非期望產(chǎn)出只采用一種污染指標(biāo)作為非期望產(chǎn)出,代表性有可能不夠。為了避免這種遺漏變量問題,本文將能源消費看成與資本投入和勞動投入一樣,是一種重要的投入要素。對于期望產(chǎn)出,本文和通常的文獻(xiàn)一樣將各地區(qū)的生產(chǎn)總值作為代表。但是非期望產(chǎn)出,本文采用SO2排放和CO2排放這兩種污染指標(biāo)。最后,上面的文獻(xiàn)一個重要缺陷是對環(huán)境全要素生產(chǎn)率指數(shù)和環(huán)境效率指數(shù)等的影響因素測量,采用的都是普通線性回歸或面板回歸的方法。本文正是考慮了上述研究的這些問題,借助Zhou等[8]測定環(huán)境全要素生產(chǎn)率指數(shù)和環(huán)境效率的研究方法。首先,得到我國省際之間環(huán)境全要素生產(chǎn)率指數(shù)及其分解;其次,應(yīng)用空間面板Tobit模型對影響環(huán)境全要素生產(chǎn)率指數(shù)的因素進(jìn)行研究;最后,是本文的實證結(jié)果分析和一些政策建議。

        公式(7)表示地區(qū)i利用t+1時期的投入和產(chǎn)出量,以t時期的技術(shù)為參照,而計算的效率大小。同樣還有三個距離函數(shù)可以通過上面的規(guī)劃問題求得,這些距離函數(shù)只需將約束條件中的上標(biāo)時間進(jìn)行更換就能得到。

        2 數(shù)據(jù)來源

        根據(jù)環(huán)境導(dǎo)向的距離函數(shù)設(shè)置和環(huán)境全要素生產(chǎn)率計算要求,我們需要資本存量、從業(yè)人員、能源消費和地區(qū)生產(chǎn)總值以及非期望產(chǎn)出SO2和CO2排放的數(shù)據(jù)。對地區(qū)資本存量我們采用永續(xù)盤存法進(jìn)行核算,可以用公式Kit=Kit-1(1-δ)+Iit來表示,其中δ表示折舊率,本文認(rèn)為折舊率為10%,這也是很多文獻(xiàn)采用的折舊率。投資數(shù)據(jù)很多文獻(xiàn)都采用的是固定資本形成總額數(shù)據(jù),本文也采用該指標(biāo),這個指標(biāo)直接從中國統(tǒng)計年鑒上可以找到。投資品的價格指數(shù)我們采用固定資產(chǎn)投資價格指數(shù)來表示。由于1997年前部分地區(qū)的很多數(shù)據(jù)不全,本文只研究了1997-2011年中國除西藏、港、澳、臺地區(qū)的30個省份情況。對于期初的資本存量,由于我們研究的期限是1997-2011年,采用1997年的固定資本形成總額除以折舊率10%和1997-2011年各省份GDP的平均增長速度得到,這樣就得到了以1997年為基期的資本存量數(shù)據(jù),單位為億元。勞動力本文采用年底就業(yè)人員數(shù)的平均值表述,單位為萬人。能源消費數(shù)據(jù)來自《中國能源統(tǒng)計年鑒》,單位是萬 t標(biāo)準(zhǔn)煤。好產(chǎn)出用各地區(qū)的地區(qū)生產(chǎn)總值表示,單位為億元,按照年鑒中提供的地區(qū)生產(chǎn)總值發(fā)展速度指數(shù)折算成不變價。中國各種統(tǒng)計年鑒中沒有CO2排放量的直接統(tǒng)計數(shù)據(jù),本文采用肖明月、方言龍的核算方式得到,單位為萬 t[10]。SO2排放的數(shù)據(jù)直接來自《中國環(huán)境統(tǒng)計年鑒》,單位為萬 t。

        3 環(huán)境全要素生產(chǎn)率分析

        根據(jù)我們收集整理的中國30個省份1997-2011年數(shù)據(jù),以及環(huán)境導(dǎo)向的距離函數(shù)公式(7)等,我們能得到四種距離函數(shù)。在得到距離函數(shù)后,可以根據(jù)公式(4)得到1998-2011年的環(huán)境全要素生產(chǎn)率指數(shù)及其分解的技術(shù)效率指數(shù)和技術(shù)進(jìn)步指數(shù)。通過分析我們發(fā)現(xiàn)絕大多數(shù)省份這些年環(huán)境全要素生產(chǎn)率是上升趨勢的,特別是廣東、貴州、湖南上升的趨勢比較明顯。但是我們也發(fā)現(xiàn)部分省份的環(huán)境全要素生產(chǎn)率出現(xiàn)下降的趨勢,例如安徽省和天津市,但占總省份的數(shù)目不多。環(huán)境全要素生產(chǎn)率上升的階段,也是我國“十一五”和“十二五”時期政府對節(jié)能減排工作的重視階段,這個時期我國多數(shù)省份也都經(jīng)歷經(jīng)濟(jì)結(jié)構(gòu)調(diào)整過程,產(chǎn)業(yè)結(jié)構(gòu)逐漸趨向合理,資源利用效率逐漸提高,環(huán)境保護(hù)意識日益增強(qiáng)。

        雖然環(huán)境全要素生產(chǎn)率雖然是上升的,但是波動還是比較劇烈的,從最高的1.847 4,到最低的0.372 5。從表1中各個省份的1998-2011年的平均值情況來看其波動的特征也比較明顯。30個省份環(huán)境全要素生產(chǎn)率指數(shù)(MCPI)在1998-2011年年均增長為2.94%,北京的環(huán)境全要素生產(chǎn)率在這30個省是增長最快,年均增長22.27%,其次是江蘇年均增長18.36%,和排名第一的北京相差3.91個百分點。湖北、上海、廣東、海南、福建、河北、浙江、天津這八個省份的環(huán)境全要素生產(chǎn)率也是年均增長率在10%以上。部分省份也出現(xiàn)了環(huán)境全要素生產(chǎn)率的下降,例如,湖南、江西、內(nèi)蒙古等地區(qū),但從總的趨勢看,這些省份的環(huán)境全要素生產(chǎn)率還是上升趨勢的。從這些平均值我們也總結(jié)出一個現(xiàn)象,環(huán)境全要素生產(chǎn)率比較低或者出現(xiàn)下降的省份,多數(shù)是中、西部地區(qū),如山西、內(nèi)蒙古、吉林、黑龍江等;而經(jīng)濟(jì)發(fā)達(dá)地區(qū)的環(huán)境全要素生產(chǎn)率不約而同的出現(xiàn)了上升。隨著發(fā)達(dá)地區(qū)環(huán)境保護(hù)意識增強(qiáng)和處罰力度的加大,省份間產(chǎn)業(yè)發(fā)生轉(zhuǎn)移的現(xiàn)象比較普遍,一些能源消耗多、污染排放大、低效率行業(yè)逐漸被轉(zhuǎn)移到中西部地區(qū)。這種現(xiàn)象導(dǎo)致中國總的環(huán)境污染排放并沒有下降的趨勢。從表1我們還得到一個非常有意義的現(xiàn)象,我國環(huán)境全要素生產(chǎn)率的上升主要來自技術(shù)進(jìn)步的提高,技術(shù)效率的貢獻(xiàn)幾乎沒發(fā)生變化。這種現(xiàn)象表明各地區(qū)提高技術(shù)進(jìn)步的同時應(yīng)該在效率方面下功夫,只有效率提高了才是一種內(nèi)涵式的發(fā)展方式。

        為了理解各省份環(huán)境全要素生產(chǎn)率波動的原因,我們從時間維度來理解波動的原因。隨著這些年中國環(huán)境保護(hù)的重視以及中國加入一些國際性的環(huán)境保護(hù)協(xié)定的要求,我國環(huán)境全要素生產(chǎn)率整體上有了較大的提高。雖然各省份的波動比較大,但是逐年的環(huán)境全要素生產(chǎn)率總體上也是上升趨勢的。表2顯示我國環(huán)境全要素生產(chǎn)率從1998年的0.868 8上升到2011年的1.132 5。特別是進(jìn)入21世紀(jì)后的這11年只有2003和2005年發(fā)生了環(huán)境全要素生產(chǎn)率的下降,其余年份,年均的增長速度都在6%以上。從時間維度來看環(huán)境全要素生產(chǎn)率的增長也主要來自技術(shù)進(jìn)步。從上面的分析我們可以看出整體上中國的經(jīng)濟(jì)增長速度和環(huán)境質(zhì)量之間的協(xié)調(diào)性越來越好。

        產(chǎn)率的提高隨著人均收入的提高也是有一定的極限,是否到了零界點與經(jīng)濟(jì)的發(fā)展水平是相關(guān)的。其次,經(jīng)濟(jì)結(jié)構(gòu)的系數(shù)為-0.155 1,表明經(jīng)濟(jì)結(jié)構(gòu)的變化導(dǎo)致環(huán)境全要素生產(chǎn)率的下降,這一點與我國的當(dāng)前現(xiàn)實經(jīng)濟(jì)是密切相關(guān)的。數(shù)據(jù)顯示我國2005年后的重工業(yè)化的傾向日益嚴(yán)重,由于重化工業(yè)是能源消耗密集型行業(yè),隨著排放的污染氣體增多,對中國的環(huán)境全要素生產(chǎn)率起到一定的阻礙作用,這一結(jié)論與采用基于投入產(chǎn)出表的兩級分解技術(shù)得到的結(jié)論是一致的。對外開放水平對環(huán)境全要素生產(chǎn)率的影響系數(shù)為-0.002 5,產(chǎn)生阻礙作用。技術(shù)進(jìn)步對環(huán)境全要素生產(chǎn)率的作用系數(shù)為0.033,且在5%的顯著性水平下顯著,技術(shù)進(jìn)步的符號符合理論的預(yù)期,一方面技術(shù)的進(jìn)步有效的降低了能源的消耗,而能源的消耗與污染的排放是直接相關(guān)的。另一個方面技術(shù)的進(jìn)步會導(dǎo)致污染控制技術(shù)和清潔生產(chǎn)技術(shù)的大量應(yīng)用,隨之環(huán)境全要素生產(chǎn)率出現(xiàn)上升情況。

        從上面的四個模型分析我們可以看到,雖然各個模型估計的系數(shù)都是符合經(jīng)濟(jì)理論意義的,但是空間面板Tobit模型有效的考慮了空間效應(yīng)和截斷分布情況,得到的結(jié)果更為可靠。最重要的是模型的顯著性比前面的三個模型都提高了,特別是技術(shù)進(jìn)步在前面的模型中都不是很顯著,隨著空間效應(yīng)的引入,這個變量的顯著性發(fā)生了明顯的改變。

        5 結(jié)論與政策含義

        通過環(huán)境導(dǎo)向的距離函數(shù),我們計算了環(huán)境全要素生產(chǎn)率指數(shù)及其分解。從上面的分析看,無論是從省份分析,還是從時間維度分析,1998-2011中國的環(huán)境全要素生產(chǎn)率指數(shù)都是上升的。影響環(huán)境全要素生產(chǎn)率因素的空間面板Tobit回歸模型分析表明,經(jīng)濟(jì)增長因素對環(huán)境全要素生產(chǎn)率產(chǎn)生正向的作用,該系數(shù)顯著,且系數(shù)值較大,是促進(jìn)環(huán)境全要素生產(chǎn)率指數(shù)上升的主要力量。人均收入的平方項對環(huán)境全要素生產(chǎn)率的影響系數(shù)為負(fù),表明對于環(huán)境全要素生產(chǎn)率的庫茲涅茨曲線存在。以工業(yè)產(chǎn)值占GDP比重表示的經(jīng)濟(jì)結(jié)構(gòu)指標(biāo),對環(huán)境全要素生產(chǎn)率指數(shù)的作用為負(fù),工業(yè)化降低了環(huán)境全要素生產(chǎn)率指數(shù)的上升。對外開放水平高并沒有導(dǎo)致環(huán)境全要素生產(chǎn)率的上升,反而起到了消極的作用。技術(shù)進(jìn)步是促進(jìn)環(huán)境全要素生產(chǎn)率指數(shù)增長的重要因素之一。

        從上面的分析我們可以看出,技術(shù)進(jìn)步無論是在全要素生產(chǎn)率構(gòu)成中,還是影響環(huán)境全要素生產(chǎn)率指數(shù)分析中都表明是主要力量和因素。這給我們的啟示是:①今后應(yīng)該繼續(xù)加大技術(shù)進(jìn)步的力度,技術(shù)進(jìn)步一方面能加快經(jīng)濟(jì)發(fā)展的速度,另一方面能夠減少能源消費,減少污染排放,是提高環(huán)境全要素生產(chǎn)率的主要渠道。②東部和經(jīng)濟(jì)發(fā)達(dá)省份在保持環(huán)境全要素生產(chǎn)率繼續(xù)增長的同時,應(yīng)進(jìn)一步發(fā)揮區(qū)位優(yōu)勢,在推動技術(shù)創(chuàng)新的同時繼續(xù)引進(jìn)國際上環(huán)保的生產(chǎn)技術(shù),借鑒國外的先進(jìn)管理經(jīng)驗,保證自身的環(huán)境全要素生產(chǎn)率穩(wěn)步提高,從而產(chǎn)生輻射帶動西部地區(qū)技術(shù)和管理經(jīng)驗的提高。西部地區(qū)在模仿和創(chuàng)新的同時,在世界產(chǎn)業(yè)轉(zhuǎn)移的過程中不能一味追求GDP的上升,今后更應(yīng)該注重是否滿足節(jié)能環(huán)保要求,發(fā)展適宜性的技術(shù)和產(chǎn)業(yè)。③對外開放水平并沒有帶來我國環(huán)境全要素生產(chǎn)率的上升,這與我國長期處于在國際分工中價值鏈的低端,生產(chǎn)的是一些“高污染、高能耗、高排放”的產(chǎn)品有一定的關(guān)系,我國出口的產(chǎn)品主要是一些資源消耗大的產(chǎn)品,今后應(yīng)該通過稅收和行政手段控制這些行業(yè)的出口,扭轉(zhuǎn)這種局面。④工業(yè)化阻礙環(huán)境全要素生產(chǎn)率的提高。我國新一輪工業(yè)化對環(huán)境全要素生產(chǎn)率產(chǎn)生了嚴(yán)重的負(fù)面影響。所以只有合理的經(jīng)濟(jì)結(jié)構(gòu)才能真正的降低環(huán)境污染,提高效率,走上可持續(xù)發(fā)展和綠色的經(jīng)濟(jì)發(fā)展道路。

        (編輯:田 紅)

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        [11]Anselin L. Spatial Econometrics: Methods and Models[M]. Kluwer,1988.

        Influencing Analysis on Chinese Provincial Environmental Total Factor Productivity

        LI Xiaosheng1 YU Zhiya1 AN Qingxian2

        (1.Department of Statistics, Anhui University of Finance and Economics, Bengbu Anhui 233030, China;

        2. School of Management, University of Science and Technology of China, Hefei Anhui 230026, China)

        Abstract Since the reform and openingup, Chinese economy obtained a rapid development. But at the same time, many environmental pollutions indexes of China increased significantly among the world ranking. Whether Chinese economic growth is one of the causes of environmental pollution? Is economic growth harmful to the environment? Does the environmental Kuznets curve exist in China? Based on these problems, domestic and foreign scholars carried out many beneficial discussion. But a lot of studies only use per capita income and per capita emissions to recognize the existence of environmental Kuznets curve. The disadvantage of this method is that it considers the process from the aspects of production outputs, which are consequences of the combination of inputs. Thus, it ignores the efficiency change in the production process. Only studying the relationship between the two kinds of outputs will affect the base of judging environmental Kuznets curve, and also hinder the recognition of the environmental factors. According to this proposition, many scholars have constructed a comprehensive index of environmental performance. Recognizing the existence of environmental Kuznets curve by studying the relationship between environmental performance indicators and per capita income. Based on the panel data of 30 provinces in China from the year 1997 to 2011, an environmental data envelopment analysis model was applied in this paper to analyze the environmental TFP index and its decomposition. It is found that the average annual growth of TFP index considering environmental factors increased 2.94%, the environmental TFP growth was mainly from technological progress. The analysis of Spatial Panel Tobit regression model affecting the environmental TFP factors showed that per capita income had the positive effect on the growth of environmental total factor productivity, which suggested that the higher the level of economic development, the better the coordination of economy and environment. Squared coefficient of per capita income was negative, indicating that the environmental TFP Kuznets Curve existed. High level of openingup led to a decline in the environmental total factor productivity. And technological progress is always the positive cause for environmental TFP growth.

        Key words distance function; environmental TFP; spatial panel tobit regression

        [11]Anselin L. Spatial Econometrics: Methods and Models[M]. Kluwer,1988.

        Influencing Analysis on Chinese Provincial Environmental Total Factor Productivity

        LI Xiaosheng1 YU Zhiya1 AN Qingxian2

        (1.Department of Statistics, Anhui University of Finance and Economics, Bengbu Anhui 233030, China;

        2. School of Management, University of Science and Technology of China, Hefei Anhui 230026, China)

        Abstract Since the reform and openingup, Chinese economy obtained a rapid development. But at the same time, many environmental pollutions indexes of China increased significantly among the world ranking. Whether Chinese economic growth is one of the causes of environmental pollution? Is economic growth harmful to the environment? Does the environmental Kuznets curve exist in China? Based on these problems, domestic and foreign scholars carried out many beneficial discussion. But a lot of studies only use per capita income and per capita emissions to recognize the existence of environmental Kuznets curve. The disadvantage of this method is that it considers the process from the aspects of production outputs, which are consequences of the combination of inputs. Thus, it ignores the efficiency change in the production process. Only studying the relationship between the two kinds of outputs will affect the base of judging environmental Kuznets curve, and also hinder the recognition of the environmental factors. According to this proposition, many scholars have constructed a comprehensive index of environmental performance. Recognizing the existence of environmental Kuznets curve by studying the relationship between environmental performance indicators and per capita income. Based on the panel data of 30 provinces in China from the year 1997 to 2011, an environmental data envelopment analysis model was applied in this paper to analyze the environmental TFP index and its decomposition. It is found that the average annual growth of TFP index considering environmental factors increased 2.94%, the environmental TFP growth was mainly from technological progress. The analysis of Spatial Panel Tobit regression model affecting the environmental TFP factors showed that per capita income had the positive effect on the growth of environmental total factor productivity, which suggested that the higher the level of economic development, the better the coordination of economy and environment. Squared coefficient of per capita income was negative, indicating that the environmental TFP Kuznets Curve existed. High level of openingup led to a decline in the environmental total factor productivity. And technological progress is always the positive cause for environmental TFP growth.

        Key words distance function; environmental TFP; spatial panel tobit regression

        [11]Anselin L. Spatial Econometrics: Methods and Models[M]. Kluwer,1988.

        Influencing Analysis on Chinese Provincial Environmental Total Factor Productivity

        LI Xiaosheng1 YU Zhiya1 AN Qingxian2

        (1.Department of Statistics, Anhui University of Finance and Economics, Bengbu Anhui 233030, China;

        2. School of Management, University of Science and Technology of China, Hefei Anhui 230026, China)

        Abstract Since the reform and openingup, Chinese economy obtained a rapid development. But at the same time, many environmental pollutions indexes of China increased significantly among the world ranking. Whether Chinese economic growth is one of the causes of environmental pollution? Is economic growth harmful to the environment? Does the environmental Kuznets curve exist in China? Based on these problems, domestic and foreign scholars carried out many beneficial discussion. But a lot of studies only use per capita income and per capita emissions to recognize the existence of environmental Kuznets curve. The disadvantage of this method is that it considers the process from the aspects of production outputs, which are consequences of the combination of inputs. Thus, it ignores the efficiency change in the production process. Only studying the relationship between the two kinds of outputs will affect the base of judging environmental Kuznets curve, and also hinder the recognition of the environmental factors. According to this proposition, many scholars have constructed a comprehensive index of environmental performance. Recognizing the existence of environmental Kuznets curve by studying the relationship between environmental performance indicators and per capita income. Based on the panel data of 30 provinces in China from the year 1997 to 2011, an environmental data envelopment analysis model was applied in this paper to analyze the environmental TFP index and its decomposition. It is found that the average annual growth of TFP index considering environmental factors increased 2.94%, the environmental TFP growth was mainly from technological progress. The analysis of Spatial Panel Tobit regression model affecting the environmental TFP factors showed that per capita income had the positive effect on the growth of environmental total factor productivity, which suggested that the higher the level of economic development, the better the coordination of economy and environment. Squared coefficient of per capita income was negative, indicating that the environmental TFP Kuznets Curve existed. High level of openingup led to a decline in the environmental total factor productivity. And technological progress is always the positive cause for environmental TFP growth.

        Key words distance function; environmental TFP; spatial panel tobit regression

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