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```
# matchingR -- Matching Algorithms in R and C++
#
# Copyright (C) 2015 Jan Tilly <jtilly@econ.upenn.edu>
# Nick Janetos <njanetos@econ.upenn.edu>
#
# This file is part of matchingR.
#
# matchingR is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# matchingR is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#' @name matchingR-package
#' @docType package
#' @title matchingR: Matching Algorithms in R and C++
#' @description matchingR is an R package which quickly computes a variety of
#' matching algorithms for one-sided and two-sided markets. This package
#' implements
#' \itemize{
#' \item{the Gale-Shapley Algorithm to compute the stable matching for
#' two-sided markets, such as the stable marriage problem and the
#' college-admissions problem}
#' \item{Irving's Algorithm to compute the stable matching for one-sided
#' markets such as the stable roommates problem}
#' \item{the top trading cycle algorithm for the indivisible goods trading
#' problem.}
#' }
#'
#' All matching algorithms are implemented in \code{C++} and can therefore be
#' computed quickly. The package may be useful when the number of market
#' participants is large or when many matchings need to be computed (e.g. for
#' extensive simulations or for estimation purposes). The Gale-Shapley
#' function of this package has successfully been used to simulate preferences
#' and compute the matching with 30,000 participants on each side of the
#' market.
#'
#' Matching markets are common in practice and widely studied by
#' economists. Popular examples include
#' \itemize{
#' \item{the National Resident Matching Program that matches graduates from
#' medical school to residency programs at teaching hospitals throughout the
#' United States}
#' \item{the matching of students to schools including the New York City High
#' School Match or the the Boston Public School Match (and many more)}
#' \item{the matching of kidney donors to recipients in kidney exchanges.}
#' }
#' @author Jan Tilly, Nick Janetos
#' @references Gale, D. and Shapley, L.S. (1962). College admissions and the
#' stability of marriage. \emph{The American Mathematical Monthly}, 69(1):
#' 9--15.
#' @references Irving, R. W. (1985). An efficient algorithm for the "stable
#' roommates" problem. \emph{Journal of Algorithms}, 6(4): 577--595
#' @references Shapley, L., & Scarf, H. (1974). On cores and indivisibility.
#' \emph{Journal of Mathematical Economics}, 1(1), 23-37.
#' @examples
#' # stable marriage problem
#' set.seed(1)
#' nmen <- 25
#' nwomen <- 20
#' uM <- matrix(runif(nmen * nwomen), nrow = nwomen, ncol = nmen)
#' uW <- matrix(runif(nwomen * nmen), nrow = nmen, ncol = nwomen)
#' results <- galeShapley.marriageMarket(uM, uW)
#' galeShapley.checkStability(uM, uW, results$proposals, results$engagements)
#'
#' # college admissions problem
#' nstudents <- 25
#' ncolleges <- 5
#' uStudents <- matrix(runif(nstudents * ncolleges), nrow = ncolleges, ncol = nstudents)
#' uColleges <- matrix(runif(nstudents * ncolleges), nrow = nstudents, ncol = ncolleges)
#' results <- galeShapley.collegeAdmissions(
#' studentUtils = uStudents,
#' collegeUtils = uColleges,
#' slots = 4
#' )
#' results
#' # check stability
#' galeShapley.checkStability(
#' uStudents,
#' uColleges,
#' results$matched.students,
#' results$matched.colleges
#' )
#'
#' # stable roommate problem
#' set.seed(2)
#' N <- 10
#' u <- matrix(runif(N^2), nrow = N, ncol = N)
#' results <- roommate(utils = u)
#' results
#' # check stability
#' roommate.checkStability(utils = u, matching = results)
#'
#' # top trading cycle algorithm
#' N <- 10
#' u <- matrix(runif(N^2), nrow = N, ncol = N)
#' results <- toptrading(utils = u)
#' results
#' # check stability
#' toptrading.checkStability(utils = u, matching = results)
#' @useDynLib matchingR
"_PACKAGE"
```

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