2Abadie A,Diamond A,Hainmueller J.Synthetic control methods for comparative case studies:Estimating the effect of California’s tobacco control program.Journal of the American Statistical Association,2010,105(490):493-505.
3Abadie A,Gardeazabal J.The economic costs of conflict:A case study of the Basque Country.American economicreview,2003,93(1):113 -132.
4Zhou Y,Wang E.Urbanconsumers'attitudes towards the safety of milk powder after the melamine scandal in 2008 and the factors influencing the attitudes.China Agricultural Economic Review,2011,3(1):101-111.
