每篇10币求sciencedirect（1篇）以及informaworld（3篇）文献

(1)Zero observations and gender differences in cigarette consumption  
Author: Steven T. Yen a

Affiliation:

a Department of Agricultural Economics, The University of Tennessee, Knoxville, TN 37996-4518, USA

DOI: 10.1080/00036840500214322
Publication Frequency: 24 issues per year
Published in: Applied Economics, Volume 37, Issue 16 September 2005 , pages 1839 - 1849
Subjects: Economics; Macroeconomics;
URL:[url]http://www.informaworld.com/smpp/ftinterface~content=a723783340~fulltext=713240930[/url]
(2)ALTERNATIVE APPROACHES TO MODELLING ZERO EXPENDITURE: AN APPLICATION TO SPANISH DEMAND FOR TOBACCO*
URL:[url]http://www3.interscience.wiley.com/journal/122367450/abstract[/url]

(3)A Box-Cox Double-Hurdle model of wildlife valuation: The citizen's perspective
URL:[url]http://dx.doi.org/10.1016/j.ecolecon.2005.07.006[/url]

(4) A double-hurdle model of Irish household expenditure on prepared meals  
Authors: Carol Newman a; Maeve Henchion b;Alan Matthews a

Affiliations:	a Department of Economics, Trinity College, Dublin 2, Ireland.
	b The National Food Centre, Dunsinea, Castleknock, Dublin 15, Ireland.

DOI: 10.1080/0003684032000079170
Publication Frequency: 24 issues per year
Published in: Applied Economics, Volume 35, Issue 9 January 2003 , pages 1053 - 1061
URL:http://www.informaworld.com/smpp/ftinterface~content=a713759336~fulltext=713240930

这是你要的论文，祝你学习快乐！！！