@incollection{, 95B7D473EE4144E708D94DC8B81BA324 , author={{ShahmirHassan} and {AmirRazi} and {University Of Lahore,Pakistan}}, journal={{Global Journal of Management and Business Research}}, journal={{GJMBR}}2249-45880975-585310.34257/GJMBR, address={Cambridge, United States}, publisher={Global Journals Organisation}13416 } @incollection{b0, , title={{}} , journal={{World Health Statistics}} , year={2007. July 2007. 1600} } @incollection{b1, , title={{Ministry of Health, Government of Pakistan}} , journal={{Pakistan Health Education Survey}} , year={1991} } @incollection{b2, , title={{}} , journal={{Pakistan Health Education Survey}} , year={1999} } @book{b3, , title={{National Health Survey of Pakistan 1990-94}} , author={{ Pakistan Medical ResearchCouncil }} , year={1998} , publisher={Network Publication Service} , address={Islamabad, Pakistan} } @incollection{b4, , title={{}} , journal={{Tobacco Control Country Profiles}} , year={2003. 2003http. July 2007} , publisher={American Cancer Society} , note={1000 hrs GMT} } @incollection{b5, , title={{}} , journal={{Pakistan Medical Research Council. Pakistan Health Education Survey}} } @book{b6, , title={{}} , author={{ PakistanIslamabad }} , year={2003} , publisher={Pakistan Medical Research Council} } @incollection{b7, , title={{Egypt: World Health Organization Eastern Mediterranean Regional Office}} , journal={{Cairo}} , year={2001} , note={Global Youth Tobacco Survey: Tobacco-free Initiative} } @book{b8, , title={{Smoking Risks in Spain: Part I -Perception of Risks to the Smoker}} , author={{ FAntoñanzas } and { WKipViscusi } and { JRovira } and { Braña } and { Portillo } and { Carvalho }} , year={August 2000} , note={Harvard John M. Olin Discussion Paper #293} } @book{b9, , title={{Causal effect of early initiation on adolescent smoking patterns}} , author={{ MAuld } and { Christopher }} , year={2003} , note={mimeo} } @incollection{b10, , title={{An empirical analysis of cigarette addiction}} , author={{ GSBecker } and { MGrossman } and { KMMurphy }} , journal={{American Economic Review}} 84 , year={1994} } @incollection{b11, , title={{The Endogenous Determination of Time Preference}} , author={{ GSBecker } and { CBMulligan }} , journal={{Quarterly Journal of Economics}} 112 3 , year={1997} } @incollection{b12, , title={{A Theory of Rational Addiction}} , author={{ GSBecker } and { KevinMurphy }} , journal={{Journal of Political Economy}} 96 , year={1988} } @book{b13, , title={{}} , author={{ ?Choi } and { SWon }} } @incollection{b14, , title={{Youth Smoking in the US: Evidence and Implications. In An Economic Analysis of Risky Behavior Among Youth}} , author={{ ElizabethAGilpin } and { ArthurJFarkas } and { JohnPPierce } and { JonathanGruber } and { JZinman }} , booktitle={{A Theory of addiction}} , editor={ GLowenstein JElster } New York , publisher={Russell Sage Foundation} , year={2001. February. 2001. 1992} 96 , note={Determining the probability of future smoking among adolescents} } @book{b15, , title={{References Références Referencias}} }