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update readme
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jhelvy committed Oct 25, 2021
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2 changes: 1 addition & 1 deletion README.Rmd
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<!-- badges: start -->
[![CRAN
status](https://www.r-pkg.org/badges/version/logitr)](https://CRAN.R-project.org/package=logitr)
[![Travis build status](https://travis-ci.com/jhelvy/logitr.svg?branch=master)](https://travis-ci.com/jhelvy/logitr)
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[![CRAN
status](https://www.r-pkg.org/badges/version/logitr)](https://CRAN.R-project.org/package=logitr)
[![Travis build
status](https://travis-ci.com/jhelvy/logitr.svg?branch=master)](https://travis-ci.com/jhelvy/logitr)
status](https://app.travis-ci.com/jhelvy/logitr.svg?branch=master)](https://app.travis-ci.com/github/jhelvy/logitr)
[![](http://cranlogs.r-pkg.org/badges/grand-total/logitr?color=blue)](https://cran.r-project.org/package=logitr)
<!-- badges: end -->

Expand All @@ -18,26 +18,26 @@ parameterizations](https://jhelvy.github.io/logitr/articles/utility_models.html)

The latest version includes support for:

- Homogeneous multinomial logit (MNL) models
- Heterogeneous mixed logit (MXL) models with normal and log-normal
- Homogeneous multinomial logit (MNL) models
- Heterogeneous mixed logit (MXL) models with normal and log-normal
parameter distributions.
- Preference space and WTP space utility parameterizations.
- Weighted models to differentially weight individual choice
- Preference space and WTP space utility parameterizations.
- Weighted models to differentially weight individual choice
observations.
- Functions for computing WTP from preference space models.
- Functions for predicting expected choices and choice probabilities
- Functions for computing WTP from preference space models.
- Functions for predicting expected choices and choice probabilities
for a set (or multiple sets) of alternatives based on an estimated
model.
- An option to run a multistart optimization loop that uses different
- An option to run a multistart optimization loop that uses different
random starting points in each iteration to search for different
local minima (useful for non-convex problems like MXL models or
models with WTP space parameterizations).

Note: MXL models assume uncorrelated heterogeneity covariances and are
estimated using maximum simulated likelihood based on the algorithms in
Kenneth Train’s book [*Discrete Choice Methods with Simulation, 2nd
Edition (New York: Cambridge University
Press, 2009)*](https://eml.berkeley.edu/books/choice2.html).
Edition (New York: Cambridge University Press,
2009)*](https://eml.berkeley.edu/books/choice2.html).

## Installation

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## Author, Version, and License Information

- Author: *John Paul Helveston* <https://www.jhelvy.com/>
- Date First Written: *Sunday, September 28, 2014*
- License:
- Author: *John Paul Helveston* <https://www.jhelvy.com/>
- Date First Written: *Sunday, September 28, 2014*
- License:
[MIT](https://github.com/jhelvy/logitr/blob/master/LICENSE.md)

## Citation Information
Expand All @@ -82,15 +82,15 @@ it if you cited it - you can get the citation by typing

``` r
citation("logitr")
#>
#>
#> To cite logitr in publications use:
#>
#>
#> John Paul Helveston (2021). logitr: Random utility logit models with
#> preference and willingness to pay space parameterizations. R package
#> version 0.4.0
#>
#>
#> A BibTeX entry for LaTeX users is
#>
#>
#> @Manual{,
#> title = {logitr: Random Utility Logit Models with Preference and Willingness to Pay Space Parameterizations},
#> author = {John Paul Helveston},
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