Jason Abrevaya and Chris Muris, "Interval Censored Regression with Fixed 
Effects," Journal of Applied Econometrics, Vol. 35, No. 2, 2020, pp. 
198-216.

This archive consists of 

1. data file 'bwdf_diff.csv' (4.0MB), which is zipped in the file
   am-data.zip

2. a zipped archive 'am-aux-files.zip' that contains R scripts and
   R Markdown files that reproduce the simulation study in the paper (6.1kB);

Files within the two zips are ASCII files in DOS format. Unix/Linux
users should use "unzip -a".


DATA
----

The data used in the empirical application are already available in the
JAE data archive, since it was previously used in J. Abrevaya,
"Estimating the Effect of Smoking on Birth Outcomes Using a Matched
Panel Data Approach," Journal of Applied Econometrics, Vol. 21, No. 4,
2006, pp. 489-519. It is available at
http://qed.econ.queensu.ca/jae/datasets/abrevaya001/.

In our empirical application, we transform the original birthweight
variable into a censored variable. We provide the transformed data set
in this archive.

The file contains 78330 observations on mothers, with values for 16
variables. The variable names are in the first line of the text file -
descriptions follow. "Difference" refers to the difference between
babies. For example "difference in birthyear" means "birthyear of
second baby minus birthyear of first baby"). Difference in age of
mother is "age of mother when second baby was born minus age of mother
when first baby was born".

For more information on the data, see the readme file

http://qed.econ.queensu.ca/jae/datasets/abrevaya001/readme.ja.txt.

Variables:

momid3    identification number of the mother
dbirwt1   birthweight of the first baby (in grams)
dbirwt2   birthweight of the second baby (in grams)
dbirwt	  difference in birthweight, dbirwt2-dbirwt1
bwtr12_1  censored version of dbirwt1
bwtr12_2  censored version of dbirwt2
idx	  constant 1
year	  difference in birth year
dmage     difference in age of mother (in years)
agesq	  difference in age^2 of mother
smoke     difference in indicator variable for smoking status (1=smoker,
            0=nonsmoker)
male      difference in indicator variable for baby gender (1=male, 0=female)
novisit   difference in indicator that no prenatal visit occurred
pretri2   difference in indicator that first prenatal visit occurred in 2nd
            trimester
pretri3   difference in indicator that first prenatal visit occurred in 3nd
            trimester
index	  identifier for a mother (1,...,78330)


SIMULATIONS
-----------

The zip file 'am-aux-files.zip' contains several R scripts
and R Markdown files that reproduce the simulation study in the paper.

The R scripts and R Markdown files require R>=2.5.0, RStudio>=1.1.4,
and the R packages tidyverse (version >=1.2.0).

01-auxiliary_files.R

  An R script containing data generation and estimation functions
  called by the next three files.

02-figure-1.Rmd

  R Markdown file that reproduces Figure 1. Requires the foreach
  package (version >=1.4.4). Open the file in RStudio and "Run all".

03-table-1.Rmd

  R Markdown file that reproduces Table 1. Requires the foreach
  package (version >=1.4.4). Open the file in RStudio and "Run all".

04-table-2.Rmd

  R Markdown file that reproduces Table 2. Requires the maxLik package
  (version >=1.3). Open the file in RStudio and "Run all" for one of
  the rows in Table 2. Follow the instructions in the file to generate
  the other rows.