Estimate Entry Models.
entrymodels: Estimate Entry Models
Tools for measuring empirically the effects of entry in concentrated markets, based in Bresnahan and Reiss (1991).
Installation
You can install the released version of entrymodels
from CRAN with:
install.packages("entrymodels")
And the development version from GitHub with:
# install.packages("devtools")
devtools::install_github("gnjardim/entrymodels")
Which should return something similar to:
* installing *source* package 'entrymodels' ...
** using staged installation
** R
** inst
** byte-compile and prepare package for lazy loading
** help
*** installing help indices
converting help for package 'entrymodels'
finding HTML links ... done
aux_matrix html
br1 html
br2 html
em_2var html
em_basic html
load_example_data html
** building package indices
** testing if installed package can be loaded from temporary location
*** arch - i386
*** arch - x64
** testing if installed package can be loaded from final location
*** arch - i386
*** arch - x64
** testing if installed package keeps a record of temporary installation path
* DONE (entrymodels)
Please note that you should have Rtools installed.
Examples
Basic Model
This is a basic example which shows you how to estimate a basic entry model with our sample data.
library(entrymodels)
tb <- load_example_data()
(em <- em_basic(tb, "Populacao", "n_agencias"))
#> # A tibble: 5 x 4
#> n_competitors critical_values[,1] alpha[,1] gamma[,1]
#> <int> <dbl> <dbl> <dbl>
#> 1 1 5238. 0.832 7.12
#> 2 2 18961. 0.832 8.19
#> 3 3 42038. 0.825 8.79
#> 4 4 75638. 0.819 9.20
#> 5 5 162958. 0.809 9.71
Two-Variable Model
This is a basic example which shows you how to estimate a two-variable entry model with our sample data.
library(entrymodels)
tb <- load_example_data()
(em <- em_2var(tb, "Populacao", "RendaPerCapita", "n_agencias"))
#> # A tibble: 5 x 4
#> n_competitors critical_values[,1] alpha[,1] gamma[,1]
#> <int> <dbl> <dbl> <dbl>
#> 1 1 5127. 1.06 17.8
#> 2 2 19265. 1.06 19.2
#> 3 3 44458. 1.05 20.0
#> 4 4 79959. 1.05 20.6
#> 5 5 169059. 1.03 20.9
Citation
To cite package entrymodels
in publications use:
Guilherme N. Jardim (2020). entrymodels: Estimate Entry Models. R package version 0.2.1. https://CRAN.R-project.org/package=entrymodels
A BibTeX entry for LaTeX users is:
@Manual{entrymodels,
title = {entrymodels: Estimate Entry Models},
author = {Guilherme {N. Jardim}},
year = {2020},
note = {R package version 0.2.1},
url = {https://CRAN.R-project.org/package=entrymodels},
}