@ARTICLE{amemiya84,
  author = {Takeshi Amemiya},
  title = {Tobit Models: A Survey},
  journal = {Journal of Econometrics},
  year = {1984},
  volume = {24},
  pages = {3-61}
}

@Book{amemiya1985,
  author =	 {Takeshi Amemiya},
  title = 	 {Advanced Econometrics},
  publisher = 	 {Harvard University Press},
  year = 	 {1985},
  address =	 {Cambridge, Massachusetts}
}

@ARTICLE{belisle92,
  author = {B{\'e}lisle, Claude J. P.},
  title = {Convergence Theorems for a Class of Simulated Annealing Algorithms
   on {R}\textsuperscript{d}},
  journal = {Journal of Applied Probability},
  year = {1992},
  volume = {29},
  pages = {885-895}
}

@ARTICLE{berndt74,
  author = {E. K. Berndt and B. H. Hall and R. E. Hall and Jerry A. Hausman},
  title = {Estimation and Inference in Nonlinear Structural Models},
  journal = {Annals of Economic and Social Measurement},
  year = {1974},
  volume = {3},
  pages = {653-665},
  number = {4}
}

@Article{calzolari+fiorentini1993,
  author = 	 {Giorgio Calzolari and Gabriele Fiorentini},
  title = 	 {Alternative Covariance Estimators of the Standard Tobit Model},
  journal = 	 {Economics Letters},
  year = 	 {1993},
  volume =	 {42},
  number =	 {1},
  pages =	 {5-13}
}

@BOOK{cameron05,
  title = {Microeconometrics: Methods and Applications},
  publisher = {Cambridge University Press},
  year = {2005},
  author = {A. Colin Cameron and Pravin K. Trivedi},
  address = {New York}
}

@Article{chamberlain1986,
  author = 	 {Gary Chamberlain},
  title = 	 {Asymptotic Efficiency in Semi-Parametric Models with Censoring},
  journal = 	 {Journal of Econometrics},
  year = 	 {1986},
  volume =	 {32},
  pages =	 {189-218},
  annote =	 {6/II 2007}
}

@ARTICLE{greene81,
  author = {William H. Greene},
  title = {Sample Selection Bias as a Specification Error: A Comment},
  journal = {Econometrica},
  year = {1981},
  volume = {49},
  pages = {795-798},
  number = {3}
}

@book{greene2002,
	author = {Greene, William  H. },
	citeulike-article-id = {105951},
	howpublished = {Hardcover},
	isbn = {0130661899},
	month = {August},
	priority = {0},
	publisher = {Prentice Hall},
	title = {Econometric Analysis},
   edition = {5th},
	year = {2002}
}

@misc{greene06,
	author = {Greene, William  H. },
	howpublished = {\url{http://pages.stern.nyu.edu/~wgreene/Text/Errata/ERRATA5.htm}},
	title = {Errata and Discussion of Econometric Analysis, 5th edition},
	year = {2006}
}

@Article{heckman1976,
  author =	 {James J. Heckman},
  title =	 {The Common Structure of Statistical Models of
                  Truncation, Sample Selection and Limited Dependent
                  Variables and a Simple Estimator for Such Models},
  journal =	 {Annals of Economic and Social Measurement},
  year =	 {1976},
  volume =	 {5},
  number =	 {4},
  pages =	 {475-492}
}

@ARTICLE{heckman79,
  author = {James J. Heckman},
  title = {Sample Selection Bias as a Specification Error},
  journal = {Econometrica},
  year = {1979},
  volume = {47},
  pages = {153-161},
  number = {1}
}

@InCollection{heckman+macurdy1986,
  author = 	 {James J. Heckman and Thomas E. MaCurdy},
  title = 	 {Labor Econometrics},
  booktitle = 	 {Handbook of Econometrics},
  pages =	 {1917-1977},
  publisher =	 {Elsevier},
  year =	 {1986},
  editor =	 {Zvi Griliches and Michael D. Intriligator},
  volume =	 {3},
  chapter =	 {32},
  address =	 {Amsterdam},
  OPTannote = 	 {}
}

@ARTICLE{henningsen07a,
  author = {Arne Henningsen and Jeff D. Hamann},
  title = {\pkg{systemfit}: A Package for Estimating Systems
      of Simultaneous Equations in \proglang{R}},
  journal = {Journal of Statistical Software},
  year = {2007},
  volume = {23},
  pages = {1-40},
  number = {4},
  url = {http://www.jstatsoft.org/v23/i04/}
}

@BOOK{johnston97,
  title = {Econometric Methods},
  publisher = {McGraw-Hill},
  year = {1997},
  author = {Jack Johnston and John DiNardo},
  edition = {4th}
}

@Article{klaauw+koning2003,
  author = 	 {Bas van der Klaauw and Ruud H. Koning},
  title = 	 {Testing the Normality Assumption in the Sample Selection Model With an
Application to Travel Demand},
  journal = 	 {Journal of Business \& Economic Statistics},
  year = 	 {2003},
  volume =	 {21},
  number =	 {1},
  pages =	 {31-42},
  month =	 {January},
  annote =       {9/VI 2003}
}

@Article{leung+yu1996,
  author = 	 {Siu Fai Leung and Shihti Yu},
  title = 	 {On the Choice Between Sample Selection and Two-Part Models},
  journal = 	 {Journal of Econometrics},
  year = 	 {1996},
  volume =	 {72},
  pages =	 {197-229},
  annote =	 {}
}

@BOOK{li07,
  title = {Nonparametric Econometrics: Theory and Practice},
  publisher = {Princeton University Press},
  year = {2007},
  author = {Qi Li and Jeffrey Scott Racine},
  address = {Princeton}
}

@Article{mroz1987,
  author = 	 {Thomas A. Mroz},
  title = 	 {The Sensitivity of an Empirical Model of Married Women's Hours to Work to Economic 
and Statistical Assumptions},
  journal = 	 {Econometrica},
  year = 	 {1987},
  volume =	 {55},
  number =	 {4},
  pages =	 {765-799},
  month =	 {7},
  annote =	 {25/III 2007}
}

@TECHREPORT{newhouse99,
  author = {Joseph P Newhouse},
  title = {{RAND} Health Insurance Experiment [in Metropolitan and
    Non-Metropolitan Areas of the {United} {States}], 1974--1982},
  institution = {ICPSR Inter-university Consortium for Political and
    Social Research},
  year = {1999},
  type = {Aggregated Claims Series, Volume 1: Codebook for Fee-for-Service
    Annual Expenditures and Visit Counts},
  number = {ICPSR 6439}
}

@Book{pagan+ullah1999,
  author =	 {Adrian Pagan and Aman Ullah},
  title = 	 {Nonparametric Econometrics},
  publisher = 	 {Cambridge University Press},
  year = 	 {1999},
  series =	 {Themes in Modern Econometrics},
  address =	 {Cambridge},
  OPTannote = 	 {}
}

@InCollection{powell1994,
  author = 	 {James L. Powell},
  title = 	 {Estimation of Semiparametric Models},
  booktitle = 	 {Handbook of Econometrics},
  pages =	 {2443-2521},
  publisher =	 {Elsevier},
  year =	 {1994},
  editor =	 {Robert F. Engle and Daniel L. McFadden},
  volume =	 {4},
  chapter =	 {41},
  edition =	 ElsevierAdr,
  OPTannote = 	 {}
}

@Article{puhani2000a,
  author = 	 {Patrick A. Puhani},
  title = 	 {The {H}eckman Correction for Sample Selection and its Critique},
  journal = 	 {Journal of Economic Surveys},
  year = 	 {2000},
  volume =	 {14},
  number =	 {1},
  pages =	 {53-68}
}

@Manual{r2007,
       title        = {\proglang{R}: A Language and Environment for Statistical
                       Computing},
       author       = {{\proglang{R} Development Core Team}},
       organization = {\proglang{R} Foundation for Statistical Computing},
       address      = {Vienna, Austria},
       year         = 2008,
       note         = {{ISBN} 3-900051-07-0},
       url          = {http://www.R-project.org/}
     }

@MANUAL{r-maxLik,
  title = {\pkg{maxLik}: Maximum Likelihood Estimation},
  author = {Ott Toomet and Arne Henningsen},
  year = {2008},
  note = {\proglang{R}~package version~0.5},
  url = {http://CRAN.R-project.org/package=maxLik}
}

@MANUAL{r-mvtnorm,
  title = {\pkg{mvtnorm}: Multivariate Normal and $t$ Distribution},
  author = {Alan Genz and Frank Bretz and Torsten Hothorn},
  year = {2005},
  note = {\proglang{R}~package version~0.7-6},
  url =  {http://CRAN.R-project.org/package=mvtnorm}
}

@MANUAL{r-systemfit,
  title = {\pkg{systemfit}: Simultaneous Equation Estimation},
  author = {Arne Henningsen and Jeff D. Hamann},
  year = {2007},
  note = {\proglang{R}~package version~1.0},
  url = {http://CRAN.R-project.org/package=systemfit}
}

@ARTICLE{toomet08,
  author = {Ott Toomet and Arne Henningsen},
  title = {Sample Selection Models in {R}: Package {sampleSelection}},
  journal = {Journal of Statistical Software},
  year = {2008},
  volume = {27},
  number = {7},
  owner = {Arne},
  timestamp = {2007.04.19},
  url = {http://www.jstatsoft.org/v27/i07/}
}

@BOOK{verbeek00,
  title = {A Guide to Modern Econometrics},
  publisher = {John Wiley \& Sons},
  address   = {Hoboken, NJ},
  year = {2000},
  author = {Marno Verbeek}
}

@BOOK{wooldridge03,
  title = {Introductory Econometrics. A Modern Approach},
  publisher = {Thomson South-Western},
  year = {2003},
  author = {Jeffrey M. Wooldridge},
  edition = {2nd}
}

@Manual{Stata,
  author	= {{StataCorp.}},
  title		= {\proglang{Stata} Statistical Software: Release~10},
  year		= {2007},
  organization	= {StataCorp LP},
  address	= {College Station, Texas},
  url		= {http://www.Stata.com/}
}

@Manual{Limdep,
  author	= {William H. Greene},
  title		= {\pkg{Limdep}~9.0 Econometric Modeling Guide, Volume 1},
  year		= {2007},
  organization	= {Econometric Software, Inc.},
  address	= {Plainview, NY},
  url		= {http://www.Limdep.com/}
}
