Chih-Sheng Hsieh and Lung-Fei Lee, "A Social Interactions Model with
Endogenous Friendship Formation and Selectivity", Journal of Applied
Econometrics, Vol. 31, No. 2, 2016, pp. 301-319.

The data used in the article are from the National Longitudinal Study
of Adolescent to Adult Health (Add Health). This is a confidential
data source administered by

     Add Health
     Carolina Population Center
     University of North Carolina at Chapel Hill 
     CB# 8120, University Square
     206 West Franklin Street
     Chapel Hill, NC 27516
     
Researchers should submit a research proposal to the above address
to get permission to use this data.

The empirical study in our paper is based on the WAVE I in-school
survey data. The file "data_arrange" provides the STATA code to
arrange the data.  The codes for estimation are written in Fortran, and
readers should complie "SCSAR.f90", "random.f90", and "tool.f90"
together to get the executable file. These four files are zipped in the
file hl-empirical.zip.

The codes of simulation in our paper are separated by data generating
process and estimation. They are also written in Fortran. The files
for both DGP and estimation are zipped in the file hl-simulation.zip.


Please address any questions to:

Chih-Sheng Hsieh
Dept. of Economics
The Chinese University of Hong Kong
Esther Lee Bulding 9th floor
Shatin Hong Kong