研究领域主要包括宏观经济学（劳动力市场与流动、健康与经济增长、收入不均等），制度经济学。主持国家自科基金面上项目和青年项目，在Journal of Public Economics, Journal of Economic Dynamics and Control, Macroeconomic Dynamics, Journal of Comparative Economics, Journal of Asia Pacific Economy, Journal of Economics, China Economic Review等国际英文期刊和《经济研究》、《金融研究》、《世界经济》、《经济学季刊》、《南方经济》等国内中文期刊上发表论文。乔老师于2017年、2018年获得优秀班主任，2008年与钱颖一教授一起获得国家优秀课程奖和北京市优秀课程奖，2004年获美国衣阿华州立大学教学优秀奖，2001年获美国衣阿华州立大学学术优秀奖。
为国家自科基金评审成员，加拿大经济学会，英国皇家经济学会和中西部经济协会会员，并担任Review of Economic Studies, Quarterly Journal of Economics, International Economic Review, Journal of Population Economics, Public Finance Review, Journal of Comparative Economics, Journal of Economics, China Economic Review, Journal of Family and Economic Issue等期刊的匿名审稿人。
 "The King Can Do No Wrong: On Criminal Immunity of Leaders" (with Jiahua Che and Kim-Sau Chung), Journal of Public Economics, 170(2019), 15-26.
 "Fertility and Old-age Labor Supply in Aging China" (with Lili Wang), China Economic Review, 57(2019), 101261.
 "Skill Complementarities and Returns to Higher Ecucation: Evidence from China's College Enrollment Expansion," (with Hongbin Li, Yueyuan Ma, Lingsheng Meng, Xinzheng Shi), China Economic Review, 46 (2017): 10-26.
 "Endogenous Borrowing Constraint and Wealth Inequality" (with Joydeep Bhattacharya and Min Wang), Macroeconomic Dynamics, 20(6) (2016): 1413-1431.
 "Job Creation and Job Destruction in China during 1998-2007" (with Hong Ma and Yuan Xu), Journal of Comparative Economics, 43(4)(2015): 1085-1100.
 "Pharmaceutical Price Regulation: Macro-level Evidence from China between 1997 and 2008" (with Binzhen Wu and Qiong Zhang), Journal of the Asia Pacific Economy, 20(2)(2015): 290-329.
 "The Good, the Bad and the Civil Society" (with Jiahua Che and Kim-Sau Chung), Journal of Public Economics, 106(2013), 68-76.
 "Unsafe Sex, AIDS, and Development," Journal of Economics, 105(3)(2012):263-279.
 "Economic Development, Risky Sexual Behavior and AIDS Epidemic" (with Xiaohan Zhong and Sung Sin) Frontiers of Economics in China, 7(3)(2012): 407-433.
 "Public and Private Expenditure on Health in a Growth Model" (with Joydeep Bhattacharya) Journal of Economic Dynamics and Control, 31(8)(2007): 2519-2535.
 "Endogenous Lifetime and Economic Growth Revisited" (with Helle Bunzel), Economic Bulletin, 15(8)(2005): 1-8.
 马弘、乔雪、徐嫄，中国制造业的就业创造与就业消失，《经济研究》， 2013年12月刊，第68-80页。
 吴斌珍、张琼、乔雪，对药品市场降价政策的评估—来自中国1997~2008年的证据，《金融研究》， 2011年第6期，第168-180页。
 "Career Concern: Beijing Style?" (wth Jiahua Che and Kim-Sau Chung), R&R, International Economic Review.
 "On the Paradox of Mediocracy" (with Qiang Fu and Ming Li), under review
 "Chasing or Cheating? Theory and Evidence on the Reliability of China's GDP" (with Shuo Chen and Zhitao Zhu)
 "Labor Market Distortion and China-US Gap in Agricultural Productivity" (with Lili Wang)
 "International Competition and Job Reallocation: Evidence from China" (with Hong Ma and Yuan Xu), 2013.
 "Environmental Tax, Double Dividend and Golden Rule – An Overlapping Generation Model Analysis" (with Jing Cao), 2009.
 "Unemployment Insurance in a Dynamic Economy with Endogenous Layoffs", 2011
"On the Paradox of Mediocracy," presented at 2019 Workshop on Political Selection, Peking University, June 5, 2019; 2018 INFER Annual Conference at Gottingen, Germany; University of International Business and Economics, China, 2017; China Meeting of Econometric Society, Wuhan, 2017; Asian Meeting of Econometric Society, Hong Kong, 2017; the 2017 Symposium of Development and Institutional Economics, Kaifeng; the 5th Chinese Conference on Organization Economics, Shanghai.
"The King Can Do No Wrong: On Criminal Immunity of Leaders", previously circulated as "To Punish or to Forgive: Accountability in a Dynamic Hierarchy," presented at University of Rochester, 2018; Hong Kong University of Science and Technology, 2016; University of Hong Kong, 2014; Hanqing Advaned Institute, Renmin University; the 2nd Chinese Conference on Organization Economics.
"Skill Complementarities and Return to Higher Education Evidence from China's College Enrollment Expansion," presented at National University of Singapore Business School, Singapore, 2015.
"Endogenous Borrowing Constraint and Wealth Inequality," presented at the workshop on "Wealth and Income Inequality in China and Singapore", Department of Economics, National University of Singapore, June 2014.
"Career Concern: Beijing Style," presented at National School of Development, Peking University, Sep 2014; the 2013 Conference on Chinese Economy, Dec 2013.
"Job Creation and Job Destruction in China," presented at the 2nd Conference on Chinese Economy, Dec 19, 2011; the 3rd Tsinghua Workshop in Macroeconomics, Aug 16, 2011.
"The Costs and Benefits of Autocracy," presented at the Inaugural China Meeting of the Econometric Society, 2013; the National Yokohama University, Japan, Feb 2012; Renmin University, Dec 14, 2011; Zhejiang University, Dec 7, 2011; Shanghai University of Finance and Economics, Dec 2, 2011; Fudan University, Dec 1, 2011; XVIth IEA World Congress 2011, the Conference on Chinese Economy (invited) in Shanghai, Dec 11, 2010; the 10th SAET conference in Singapore, August 13, 2010.
"Unemployment Insurance in a Dynamic Economy with Endogenous Layoffs," presented at Tsinghua Macro Workshop, Beijing, China, June 2010;Chinese University of Hong Kong, Shatin, Hong Kong, Dec 2008; Shanghai University of Finance and Economics, Shanghai, China, Nov 2008; Fudan University, Shanghai, China, Nov 2008; Canadian Economic Association Annual Meeting, Vancouver, Canada, June 2008; The Chinese Economists Society (CES) Annual Meeting, Tianjin, China, April 2008; The Society of Economic Dynamics (SED) Summer Meeting, Prague, Cezch Republic, July 2007; Midwest Macroeconomic Meeting, Federal Reserve Bank of Cleveland, Cleveland, USA, April 2007
"Environmental Tax, Double Dividend and Golden Rule – An Overlapping Generation Model Analysis," with Jing Cao, presented at Workshop on ―Trade, Growth and Environment, Venice International University, Italy, June 2008; The Chinese Economists Society (CES) Annual Meeting, Tianjin, China, April 2008
"Dynamic Inefficiency, Environmental Tax and Climate Change," with Jing Cao, presented at the 2009 APJAE Symposium on ―Trade, Environment and Resources, invited speaker, May 18-20, CityUniversity of Hong Kong.