\contentsline {chapter}{\numberline {1}Introduction}{3}{chapter.1}
\contentsline {section}{\numberline {1.1}What \textsc {MatchIt}\ Does}{3}{section.1.1}
\contentsline {section}{\numberline {1.2}Software Requirements}{3}{section.1.2}
\contentsline {section}{\numberline {1.3}Installing \textsc {MatchIt}}{4}{section.1.3}
\contentsline {section}{\numberline {1.4}Loading \textsc {MatchIt}}{4}{section.1.4}
\contentsline {section}{\numberline {1.5}Updating \textsc {MatchIt}}{4}{section.1.5}
\contentsline {chapter}{\numberline {2}Statistical Overview}{5}{chapter.2}
\contentsline {section}{\numberline {2.1}Preprocessing via Matching}{6}{section.2.1}
\contentsline {section}{\numberline {2.2}Checking Balance}{7}{section.2.2}
\contentsline {section}{\numberline {2.3}Conducting Analyses after Matching}{7}{section.2.3}
\contentsline {chapter}{\numberline {3}User's Guide to \textsc {MatchIt}}{9}{chapter.3}
\contentsline {section}{\numberline {3.1}Preprocessing via Matching}{9}{section.3.1}
\contentsline {subsection}{\numberline {3.1.1}Quick Overview}{9}{subsection.3.1.1}
\contentsline {subsection}{\numberline {3.1.2}Examples}{9}{subsection.3.1.2}
\contentsline {subsubsection}{\numberline {3.1.2.1}Exact Matching}{10}{subsubsection.3.1.2.1}
\contentsline {subsubsection}{\numberline {3.1.2.2}Subclassification}{10}{subsubsection.3.1.2.2}
\contentsline {subsubsection}{\numberline {3.1.2.3}Nearest Neighbor Matching}{11}{subsubsection.3.1.2.3}
\contentsline {subsubsection}{\numberline {3.1.2.4}Optimal Matching}{11}{subsubsection.3.1.2.4}
\contentsline {subsubsection}{\numberline {3.1.2.5}Full Matching}{11}{subsubsection.3.1.2.5}
\contentsline {subsubsection}{\numberline {3.1.2.6}Genetic Matching}{12}{subsubsection.3.1.2.6}
\contentsline {subsubsection}{\numberline {3.1.2.7}Coarsened Exact Matching}{12}{subsubsection.3.1.2.7}
\contentsline {section}{\numberline {3.2}Checking Balance}{13}{section.3.2}
\contentsline {subsection}{\numberline {3.2.1}Quick Overview}{13}{subsection.3.2.1}
\contentsline {subsection}{\numberline {3.2.2}Details}{13}{subsection.3.2.2}
\contentsline {subsubsection}{\numberline {3.2.2.1}The {\tt summary()} Command}{13}{subsubsection.3.2.2.1}
\contentsline {subsubsection}{\numberline {3.2.2.2}The \texttt {plot()} Command}{14}{subsubsection.3.2.2.2}
\contentsline {section}{\numberline {3.3}Conducting Analyses after Matching}{16}{section.3.3}
\contentsline {subsection}{\numberline {3.3.1}Quick Overview}{16}{subsection.3.3.1}
\contentsline {subsection}{\numberline {3.3.2}Examples}{17}{subsection.3.3.2}
\contentsline {chapter}{\numberline {4}Reference Manual}{22}{chapter.4}
\contentsline {section}{\numberline {4.1}\texttt {matchit()}: Implementation of Matching Methods}{22}{section.4.1}
\contentsline {subsubsection}{\numberline {4.1.0.1}Syntax}{22}{subsubsection.4.1.0.1}
\contentsline {subsubsection}{\numberline {4.1.0.2}Arguments}{22}{subsubsection.4.1.0.2}
\contentsline {paragraph}{\numberline {4.1.0.2.1}Arguments for All Matching Methods}{22}{paragraph.4.1.0.2.1}
\contentsline {paragraph}{\numberline {4.1.0.2.2}Additional Arguments for Specification of Distance Measures}{23}{paragraph.4.1.0.2.2}
\contentsline {paragraph}{\numberline {4.1.0.2.3}Additional Arguments for Subclassification}{25}{paragraph.4.1.0.2.3}
\contentsline {paragraph}{\numberline {4.1.0.2.4}Additional Arguments for Nearest Neighbor Matching}{25}{paragraph.4.1.0.2.4}
\contentsline {paragraph}{\numberline {4.1.0.2.5}Additional Arguments for Optimal Matching}{26}{paragraph.4.1.0.2.5}
\contentsline {paragraph}{\numberline {4.1.0.2.6}Additional Arguments for Full Matching}{26}{paragraph.4.1.0.2.6}
\contentsline {paragraph}{\numberline {4.1.0.2.7}Additional Arguments for Genetic Matching}{27}{paragraph.4.1.0.2.7}
\contentsline {paragraph}{\numberline {4.1.0.2.8}Additional Arguments for Coarsened Exact Matching}{27}{paragraph.4.1.0.2.8}
\contentsline {subsubsection}{\numberline {4.1.0.3}Output Values}{27}{subsubsection.4.1.0.3}
\contentsline {section}{\numberline {4.2}\texttt {summary()}: Numerical Summaries of Balance}{28}{section.4.2}
\contentsline {subsubsection}{\numberline {4.2.0.1}Syntax}{28}{subsubsection.4.2.0.1}
\contentsline {subsubsection}{\numberline {4.2.0.2}Arguments}{29}{subsubsection.4.2.0.2}
\contentsline {subsubsection}{\numberline {4.2.0.3}Output Values}{29}{subsubsection.4.2.0.3}
\contentsline {section}{\numberline {4.3}\texttt {plot()}: Graphical Summaries of Balance}{30}{section.4.3}
\contentsline {subsection}{\numberline {4.3.1}Plot options for the matchit object}{30}{subsection.4.3.1}
\contentsline {subsubsection}{\numberline {4.3.1.1}Syntax}{31}{subsubsection.4.3.1.1}
\contentsline {subsubsection}{\numberline {4.3.1.2}Arguments}{31}{subsubsection.4.3.1.2}
\contentsline {subsubsection}{\numberline {4.3.1.3}Output Values}{31}{subsubsection.4.3.1.3}
\contentsline {subsection}{\numberline {4.3.2}Plot options for the matchit summary object}{32}{subsection.4.3.2}
\contentsline {subsubsection}{\numberline {4.3.2.1}Syntax}{32}{subsubsection.4.3.2.1}
\contentsline {subsubsection}{\numberline {4.3.2.2}Arguments}{32}{subsubsection.4.3.2.2}
\contentsline {subsubsection}{\numberline {4.3.2.3}Output Values}{32}{subsubsection.4.3.2.3}
\contentsline {section}{\numberline {4.4}\texttt {match.data()}: Extracting the Matched Data Set}{32}{section.4.4}
\contentsline {subsection}{\numberline {4.4.1}Usage}{32}{subsection.4.4.1}
\contentsline {subsection}{\numberline {4.4.2}Arguments}{32}{subsection.4.4.2}
\contentsline {subsection}{\numberline {4.4.3}Examples}{33}{subsection.4.4.3}
\contentsline {chapter}{\numberline {5}Frequently Asked Questions}{35}{chapter.5}
\contentsline {section}{\numberline {5.1}How do I Cite this Work?}{35}{section.5.1}
\contentsline {section}{\numberline {5.2}What if My datasets Are Big and Are Taking Up Too Much Memory?}{35}{section.5.2}
\contentsline {section}{\numberline {5.3}How Exactly are the Weights Created?}{36}{section.5.3}
\contentsline {section}{\numberline {5.4}How Do I Create Observation Names?}{36}{section.5.4}
\contentsline {section}{\numberline {5.5}How Can I See Outcomes of Matched Pairs?}{37}{section.5.5}
\contentsline {section}{\numberline {5.6}How Do I Ensure Replicability As \textsc {MatchIt}\ Versions Develop?}{37}{section.5.6}
\contentsline {section}{\numberline {5.7}How Do I Use My Own Distance Measure with \textsc {MatchIt}\tmspace +\thinmuskip {.1667em}?}{37}{section.5.7}
\contentsline {section}{\numberline {5.8}What Do I Do about Missing Data?}{38}{section.5.8}
\contentsline {section}{\numberline {5.9}Why Preprocessing?}{38}{section.5.9}
\contentsline {chapter}{\numberline {6}What's New?}{39}{chapter.6}
