R version 2.5.0 (2007-04-23) Copyright (C) 2007 The R Foundation for Statistical Computing ISBN 3-900051-07-0 R is free software and comes with ABSOLUTELY NO WARRANTY. You are welcome to redistribute it under certain conditions. Type 'license()' or 'licence()' for distribution details. Natural language support but running in an English locale R is a collaborative project with many contributors. Type 'contributors()' for more information and 'citation()' on how to cite R or R packages in publications. Type 'demo()' for some demos, 'help()' for on-line help, or 'help.start()' for an HTML browser interface to help. Type 'q()' to quit R. > # > # Gerber, Alan S. and Donald P. Green. 2000. "The Effects of Canvassing, Telephone Calls, and > # Direct Mail on Voter Turnout: A Field Experiment." American Political Science Review 94: 653-663. > # > # Imai, Kosuke. forthcoming. "Do Get-Out-The-Vote Calls Reduce Turnout? The Importance of > # Statistical Methods for Field Experiments". http://www.princeton.edu/~kimai/research/matching.html > # > > library(Matching) Loading required package: rgenoud ## rgenoud (Version 5.1-14, Build Date: 2007-08-04) ## See http://sekhon.berkeley.edu/rgenoud for additional documentation. Loading required package: MASS ## ## Matching (Version 4.5-2, Build Date: 2007/08/22) ## See http://sekhon.berkeley.edu/matching for additional documentation. ## Please cite software as: ## Jasjeet S. Sekhon. 2007. ``Multivariate and Propensity Score Matching ## Software with Automated Balance Optimization: The Matching package for R.'' ## Journal of Statistical Software. ## Information on package 'Matching' Description: Package: Matching Version: 4.5-2 Date: 2007/08/22 Title: Multivariate and Propensity Score Matching with Balance Optimization Author: Jasjeet Singh Sekhon Maintainer: Jasjeet Singh Sekhon Description: Provides functions for multivariate and propensity score matching and for finding optimal balance based on a genetic search algorithm. A variety of univariate and multivariate metrics to determine if balance has been obtained are also provided. Depends: R (>= 2.0.0), rgenoud (>= 2.12), MASS (>= 7.2-1), graphics, grDevices, stats Suggests: snow (>= 0.2-1) License: GPL3 as long as authorship of this code is made clear URL: http://sekhon.berkeley.edu/matching Packaged: Wed Aug 22 19:54:15 2007; sekhon Built: R 2.5.0; x86_64-unknown-linux-gnu; 2007-08-22 19:57:42; unix Index: balanceMV Multivariate Tests for Balance balanceUV Univariate Balance Tests GenMatch Genetic Matching GerberGreenImai Gerber and Green Dataset used by Imai ks.boot Bootstrap Kolmogorov-Smirnov lalonde Lalonde Dataset Match Multivariate and Propensity Score Matching Estimator for Causal Inference MatchBalance Tests for Univariate and Multivariate Balance Matchby Grouped Multivariate and Propensity Score Matching qqstats QQ Summary Statistics summary.balanceMV Summarizing output from balanceMV summary.balanceUV Summarizing output from balanceUV summary.ks.boot Summarizing output from ks.boot summary.Match Summarizing output from Match summary.Matchby Summarizing output from Matchby > library(help=Matching) > demo(GerberGreenImai) demo(GerberGreenImai) ---- ~~~~~~~~~~~~~~~ > # > # Gerber, Alan S. and Donald P. Green. 2000. "The Effects of Canvassing, Telephone Calls, and > # Direct Mail on Voter Turnout: A Field Experiment." American Political Science Review 94: 653-663. > # > # Imai, Kosuke. 2005. "Do Get-Out-The-Vote ..." ... [TRUNCATED] > data(GerberGreenImai) > #replication of Imai's propensity score matching model > pscore.glm<-glm(PHN.C1 ~ PERSONS + VOTE96.1 + NEW + MAJORPTY + AGE + + WARD + PERSONS:VOTE96.1 + PERSONS:NEW + AGE2, + family=binomial(logit), data=GerberGree .... [TRUNCATED] > D<-GerberGreenImai$PHN.C1 #treatment phone calls > Y<-GerberGreenImai$VOTED98 #outcome, turnout > cat("\nTHIS MODEL FAILS TO BALANCE AGE\n") THIS MODEL FAILS TO BALANCE AGE > X <- fitted(pscore.glm) > #propensity score matching estimator > r1 <- Match(Y=Y, Tr=D, X=X, M=3) > summary(r1) Estimate... 0.056143 AI SE...... 0.032440 T-stat..... 1.7307 p.val...... 0.083505 Original number of observations.............. 10829 Original number of treated obs............... 247 Matched number of observations............... 247 Matched number of observations (unweighted). 4638 > #check for balance before and after matching > mb1 <- MatchBalance(PHN.C1 ~ AGE + AGE2 + PERSONS + VOTE96.1 + NEW + MAJORPTY + + WARD + I(PERSONS*VOTE96.1) + I(PERSONS*NEW), match.out=r1, + data=GerberGree .... [TRUNCATED] ***** (V1) AGE ***** Before Matching After Matching mean treatment........ 58.308 58.308 mean control.......... 49.425 58.642 std mean diff......... 44.752 -1.6835 mean raw eQQ diff..... 8.923 1.1800 med raw eQQ diff..... 9 1 max raw eQQ diff..... 19 7 mean eCDF diff........ 0.11140 0.014937 med eCDF diff........ 0.11774 0.010349 max eCDF diff........ 0.22290 0.056274 var ratio (Tr/Co)..... 1.1228 0.9957 T-test p-value........ 2.8173e-11 0.75534 KS Bootstrap p-value.. < 2.22e-16 < 2.22e-16 KS Naive p-value...... 7.6768e-11 8.3617e-07 KS Statistic.......... 0.22290 0.056274 ***** (V2) AGE2 ***** Before Matching After Matching mean treatment........ 37.921 37.921 mean control.......... 27.937 38.329 std mean diff......... 44.468 -1.8158 mean raw eQQ diff..... 10.019 1.1526 med raw eQQ diff..... 7.85 1.03 max raw eQQ diff..... 23.37 12.95 mean eCDF diff........ 0.11140 0.014937 med eCDF diff........ 0.11774 0.010349 max eCDF diff........ 0.22290 0.056274 var ratio (Tr/Co)..... 1.2200 0.95603 T-test p-value........ 3.5657e-11 0.72991 KS Bootstrap p-value.. < 2.22e-16 < 2.22e-16 KS Naive p-value...... 7.6768e-11 8.3617e-07 KS Statistic.......... 0.22290 0.056274 ***** (V3) PERSONS ***** Before Matching After Matching mean treatment........ 1.5182 1.5182 mean control.......... 1.5021 1.5063 std mean diff......... 3.2235 2.3855 mean raw eQQ diff..... 0.016194 0.0097025 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0080698 0.0048512 med eCDF diff........ 0.0080698 0.0048512 max eCDF diff........ 0.016140 0.0097025 var ratio (Tr/Co)..... 1.0027 0.99883 T-test p-value........ 0.61693 0.7632 ***** (V4) VOTE96.1 ***** Before Matching After Matching mean treatment........ 0.71255 0.71255 mean control.......... 0.53081 0.70365 std mean diff......... 40.076 1.9617 mean raw eQQ diff..... 0.18219 0.009918 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.090872 0.004959 med eCDF diff........ 0.090872 0.004959 max eCDF diff........ 0.18174 0.009918 var ratio (Tr/Co)..... 0.82568 0.98224 T-test p-value........ 2.0709e-09 0.7837 ***** (V5) NEW ***** Before Matching After Matching mean treatment........ 0.11336 0.11336 mean control.......... 0.20129 0.11609 std mean diff......... -27.677 -0.86004 mean raw eQQ diff..... 0.089069 0.022208 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.043962 0.011104 med eCDF diff........ 0.043962 0.011104 max eCDF diff........ 0.087925 0.022208 var ratio (Tr/Co)..... 0.62766 0.97948 T-test p-value........ 2.7138e-05 0.91226 ***** (V6) MAJORPTY ***** Before Matching After Matching mean treatment........ 0.80162 0.80162 mean control.......... 0.74476 0.77714 std mean diff......... 14.231 6.1256 mean raw eQQ diff..... 0.05668 0.004959 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.028432 0.0024795 med eCDF diff........ 0.028432 0.0024795 max eCDF diff........ 0.056864 0.004959 var ratio (Tr/Co)..... 0.83988 0.9182 T-test p-value........ 0.028254 0.45981 ***** (V7) WARD3 ***** Before Matching After Matching mean treatment........ 0.012146 0.012146 mean control.......... 0.025799 0.010816 std mean diff......... -12.439 1.2117 mean raw eQQ diff..... 0.016194 0.0051746 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0068264 0.0025873 med eCDF diff........ 0.0068264 0.0025873 max eCDF diff........ 0.013653 0.0051746 var ratio (Tr/Co)..... 0.47929 1.1215 T-test p-value........ 0.057321 0.88578 ***** (V8) WARD4 ***** Before Matching After Matching mean treatment........ 0.0080972 0.0080972 mean control.......... 0.022113 0.010098 std mean diff......... -15.608 -2.2279 mean raw eQQ diff..... 0.016194 0.0092712 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0070079 0.0046356 med eCDF diff........ 0.0070079 0.0046356 max eCDF diff........ 0.014016 0.0092712 var ratio (Tr/Co)..... 0.37289 0.8035 T-test p-value........ 0.018007 0.80933 ***** (V9) WARD5 ***** Before Matching After Matching mean treatment........ 0.016194 0.016194 mean control.......... 0.0189 0.010364 std mean diff......... -2.1392 4.6101 mean raw eQQ diff..... 0.0040486 0.00064683 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0013528 0.00032342 med eCDF diff........ 0.0013528 0.00032342 max eCDF diff........ 0.0027057 0.00064683 var ratio (Tr/Co)..... 0.86262 1.5534 T-test p-value........ 0.74035 0.56994 ***** (V10) WARD6 ***** Before Matching After Matching mean treatment........ 0.020243 0.020243 mean control.......... 0.041108 0.022823 std mean diff......... -14.785 -1.8285 mean raw eQQ diff..... 0.024291 0.014877 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.010432 0.0074386 med eCDF diff........ 0.010432 0.0074386 max eCDF diff........ 0.020865 0.014877 var ratio (Tr/Co)..... 0.50515 0.88929 T-test p-value........ 0.023887 0.83806 ***** (V11) WARD7 ***** Before Matching After Matching mean treatment........ 0.012146 0.012146 mean control.......... 0.031847 0.012251 std mean diff......... -17.949 -0.095498 mean raw eQQ diff..... 0.020243 0.0012937 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0098504 0.00064683 med eCDF diff........ 0.0098504 0.00064683 max eCDF diff........ 0.019701 0.0012937 var ratio (Tr/Co)..... 0.39069 0.99155 T-test p-value........ 0.006539 0.9902 ***** (V12) WARD8 ***** Before Matching After Matching mean treatment........ 0.02834 0.02834 mean control.......... 0.03402 0.02208 std mean diff......... -3.4159 3.7647 mean raw eQQ diff..... 0.0080972 0.0090556 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.00284 0.0045278 med eCDF diff........ 0.00284 0.0045278 max eCDF diff........ 0.00568 0.0090556 var ratio (Tr/Co)..... 0.84127 1.2753 T-test p-value........ 0.59687 0.64774 ***** (V13) WARD9 ***** Before Matching After Matching mean treatment........ 0.036437 0.036437 mean control.......... 0.036572 0.036173 std mean diff......... -0.071523 0.14083 mean raw eQQ diff..... 0 0.0073307 med raw eQQ diff..... 0 0 max raw eQQ diff..... 0 1 mean eCDF diff........ 6.7145e-05 0.0036654 med eCDF diff........ 6.7145e-05 0.0036654 max eCDF diff........ 0.00013429 0.0073307 var ratio (Tr/Co)..... 1.0004 1.0070 T-test p-value........ 0.99114 0.98703 ***** (V14) WARD10 ***** Before Matching After Matching mean treatment........ 0.064777 0.064777 mean control.......... 0.042714 0.0572 std mean diff......... 8.9458 3.0724 mean raw eQQ diff..... 0.020243 0.013799 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.011032 0.0068995 med eCDF diff........ 0.011032 0.0068995 max eCDF diff........ 0.022063 0.013799 var ratio (Tr/Co)..... 1.4875 1.1234 T-test p-value........ 0.16422 0.69738 ***** (V15) WARD11 ***** Before Matching After Matching mean treatment........ 0.076923 0.076923 mean control.......... 0.042620 0.081194 std mean diff......... 12.847 -1.5994 mean raw eQQ diff..... 0.032389 0.0062527 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.017152 0.0031263 med eCDF diff........ 0.017152 0.0031263 max eCDF diff........ 0.034304 0.0062527 var ratio (Tr/Co)..... 1.7471 0.9518 T-test p-value........ 0.045949 0.83068 ***** (V16) WARD12 ***** Before Matching After Matching mean treatment........ 0.036437 0.036437 mean control.......... 0.034398 0.04132 std mean diff......... 1.0861 -2.6005 mean raw eQQ diff..... 0 0.0032342 med raw eQQ diff..... 0 0 max raw eQQ diff..... 0 1 mean eCDF diff........ 0.0010196 0.0016171 med eCDF diff........ 0.0010196 0.0016171 max eCDF diff........ 0.0020392 0.0032342 var ratio (Tr/Co)..... 1.0612 0.88632 T-test p-value........ 0.86605 0.76452 ***** (V17) WARD13 ***** Before Matching After Matching mean treatment........ 0.040486 0.040486 mean control.......... 0.041108 0.040446 std mean diff......... -0.3148 0.020252 mean raw eQQ diff..... 0.0040486 0.022208 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.00031086 0.011104 med eCDF diff........ 0.00031086 0.011104 max eCDF diff........ 0.00062171 0.022208 var ratio (Tr/Co)..... 0.98943 1.0009 T-test p-value........ 0.96104 0.998 ***** (V18) WARD14 ***** Before Matching After Matching mean treatment........ 0.024291 0.024291 mean control.......... 0.036194 0.018969 std mean diff......... -7.7153 3.4501 mean raw eQQ diff..... 0.012146 0.0097025 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.005951 0.0048512 med eCDF diff........ 0.005951 0.0048512 max eCDF diff........ 0.011902 0.0097025 var ratio (Tr/Co)..... 0.68214 1.2736 T-test p-value........ 0.23421 0.68269 ***** (V19) WARD15 ***** Before Matching After Matching mean treatment........ 0.032389 0.032389 mean control.......... 0.031091 0.034104 std mean diff......... 0.7318 -0.96678 mean raw eQQ diff..... 0 0.00086244 med raw eQQ diff..... 0 0 max raw eQQ diff..... 0 1 mean eCDF diff........ 0.00064907 0.00043122 med eCDF diff........ 0.00064907 0.00043122 max eCDF diff........ 0.0012981 0.00086244 var ratio (Tr/Co)..... 1.0445 0.9514 T-test p-value........ 0.90953 0.91296 ***** (V20) WARD16 ***** Before Matching After Matching mean treatment........ 0.020243 0.020243 mean control.......... 0.02268 0.023083 std mean diff......... -1.7270 -2.0123 mean raw eQQ diff..... 0.0040486 0.0015093 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0012186 0.00075464 med eCDF diff........ 0.0012186 0.00075464 max eCDF diff........ 0.0024371 0.0015093 var ratio (Tr/Co)..... 0.89832 0.87953 T-test p-value........ 0.78894 0.82277 ***** (V21) WARD17 ***** Before Matching After Matching mean treatment........ 0.076923 0.076923 mean control.......... 0.04725 0.08248 std mean diff......... 11.113 -2.0812 mean raw eQQ diff..... 0.02834 0.0066839 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.014837 0.0033420 med eCDF diff........ 0.014837 0.0033420 max eCDF diff........ 0.029673 0.0066839 var ratio (Tr/Co)..... 1.5836 0.93828 T-test p-value........ 0.084166 0.78467 ***** (V22) WARD18 ***** Before Matching After Matching mean treatment........ 0.08502 0.08502 mean control.......... 0.054621 0.09833 std mean diff......... 10.877 -4.7621 mean raw eQQ diff..... 0.02834 0.0053903 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.015200 0.0026951 med eCDF diff........ 0.015200 0.0026951 max eCDF diff........ 0.030399 0.0053903 var ratio (Tr/Co)..... 1.5125 0.87741 T-test p-value........ 0.09103 0.54255 ***** (V23) WARD19 ***** Before Matching After Matching mean treatment........ 0.016194 0.016194 mean control.......... 0.032036 0.013136 std mean diff......... -12.525 2.4178 mean raw eQQ diff..... 0.016194 0.0030185 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0079206 0.0015093 med eCDF diff........ 0.0079206 0.0015093 max eCDF diff........ 0.015841 0.0030185 var ratio (Tr/Co)..... 0.51582 1.2290 T-test p-value........ 0.055241 0.77736 ***** (V24) WARD20 ***** Before Matching After Matching mean treatment........ 0.036437 0.036437 mean control.......... 0.030807 0.035636 std mean diff......... 2.9987 0.42650 mean raw eQQ diff..... 0.0040486 0.0010781 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0028151 0.00053903 med eCDF diff........ 0.0028151 0.00053903 max eCDF diff........ 0.0056302 0.0010781 var ratio (Tr/Co)..... 1.1806 1.0216 T-test p-value........ 0.64112 0.96163 ***** (V25) WARD21 ***** Before Matching After Matching mean treatment........ 0.024291 0.024291 mean control.......... 0.027500 0.019343 std mean diff......... -2.0796 3.2078 mean raw eQQ diff..... 0.0040486 0.0062527 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.001604 0.0031263 med eCDF diff........ 0.001604 0.0031263 max eCDF diff........ 0.003208 0.0062527 var ratio (Tr/Co)..... 0.88977 1.2495 T-test p-value........ 0.74724 0.69425 ***** (V26) WARD22 ***** Before Matching After Matching mean treatment........ 0 0 mean control.......... 0.026555 0 std mean diff......... -Inf 0 mean raw eQQ diff..... 0.02834 0 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 0 mean eCDF diff........ 0.013277 0 med eCDF diff........ 0.013277 0 max eCDF diff........ 0.026555 0 var ratio (Tr/Co)..... 0 NaN T-test p-value........ < 2.22e-16 1 ***** (V27) WARD23 ***** Before Matching After Matching mean treatment........ 0.0040486 0.0040486 mean control.......... 0.027311 0.0035831 std mean diff......... -36.559 0.73156 mean raw eQQ diff..... 0.024291 0 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 0 mean eCDF diff........ 0.011631 0 med eCDF diff........ 0.011631 0 max eCDF diff........ 0.023262 0 var ratio (Tr/Co)..... 0.15239 1.1294 T-test p-value........ 1.6528e-07 0.87405 ***** (V28) WARD24 ***** Before Matching After Matching mean treatment........ 0.016194 0.016194 mean control.......... 0.039879 0.011593 std mean diff......... -18.726 3.6377 mean raw eQQ diff..... 0.024291 0.019189 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.011842 0.0095947 med eCDF diff........ 0.011842 0.0095947 max eCDF diff........ 0.023685 0.019189 var ratio (Tr/Co)..... 0.41776 1.3903 T-test p-value........ 0.0045047 0.65097 ***** (V29) WARD25 ***** Before Matching After Matching mean treatment........ 0.076923 0.076923 mean control.......... 0.046022 0.070936 std mean diff......... 11.573 2.2423 mean raw eQQ diff..... 0.02834 0.012937 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.015451 0.0064683 med eCDF diff........ 0.015451 0.0064683 max eCDF diff........ 0.030902 0.012937 var ratio (Tr/Co)..... 1.6237 1.0774 T-test p-value........ 0.072117 0.76166 ***** (V30) WARD26 ***** Before Matching After Matching mean treatment........ 0.068826 0.068826 mean control.......... 0.045171 0.07514 std mean diff......... 9.325 -2.4889 mean raw eQQ diff..... 0.020243 0.017249 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.011827 0.0086244 med eCDF diff........ 0.011827 0.0086244 max eCDF diff........ 0.023655 0.017249 var ratio (Tr/Co)..... 1.4918 0.92223 T-test p-value........ 0.14713 0.75521 ***** (V31) WARD27 ***** Before Matching After Matching mean treatment........ 0.072874 0.072874 mean control.......... 0.050463 0.076891 std mean diff......... 8.6046 -1.5421 mean raw eQQ diff..... 0.020243 0.014015 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.011206 0.0070073 med eCDF diff........ 0.011206 0.0070073 max eCDF diff........ 0.022411 0.014015 var ratio (Tr/Co)..... 1.4156 0.95189 T-test p-value........ 0.18102 0.8513 ***** (V32) WARD28 ***** Before Matching After Matching mean treatment........ 0.036437 0.036437 mean control.......... 0.029673 0.037818 std mean diff......... 3.6027 -0.73525 mean raw eQQ diff..... 0.0040486 0.0068995 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0033821 0.0034498 med eCDF diff........ 0.0033821 0.0034498 max eCDF diff........ 0.0067642 0.0068995 var ratio (Tr/Co)..... 1.2242 0.96488 T-test p-value........ 0.57537 0.93477 ***** (V33) WARD29 ***** Before Matching After Matching mean treatment........ 0.024291 0.024291 mean control.......... 0.017672 0.018991 std mean diff......... 4.2913 3.4361 mean raw eQQ diff..... 0.0040486 0.0025873 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.00331 0.0012937 med eCDF diff........ 0.00331 0.0012937 max eCDF diff........ 0.00662 0.0025873 var ratio (Tr/Co)..... 1.3708 1.2722 T-test p-value........ 0.50425 0.67506 ***** (V34) WARD30 ***** Before Matching After Matching mean treatment........ 0.020243 0.020243 mean control.......... 0.033926 0.022929 std mean diff......... -9.696 -1.9036 mean raw eQQ diff..... 0.016194 0.00064683 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.0068413 0.00032342 med eCDF diff........ 0.0068413 0.00032342 max eCDF diff........ 0.013683 0.00064683 var ratio (Tr/Co)..... 0.60754 0.88527 T-test p-value........ 0.136 0.8373 ***** (V35) I(PERSONS * VOTE96.1) ***** Before Matching After Matching mean treatment........ 1.1417 1.1417 mean control.......... 0.82858 1.1137 std mean diff......... 37.443 3.3481 mean raw eQQ diff..... 0.31174 0.020914 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.10437 0.0069714 med eCDF diff........ 0.13138 0.009918 max eCDF diff........ 0.18174 0.010996 var ratio (Tr/Co)..... 0.94808 1.0044 T-test p-value........ 1.7992e-08 0.63483 KS Bootstrap p-value.. < 2.22e-16 0.414 KS Naive p-value...... 2.3780e-07 0.94187 KS Statistic.......... 0.18174 0.010996 ***** (V36) I(PERSONS * NEW) ***** Before Matching After Matching mean treatment........ 0.13765 0.13765 mean control.......... 0.27755 0.14545 std mean diff......... -34.134 -1.9024 mean raw eQQ diff..... 0.1417 0.024795 med raw eQQ diff..... 0 0 max raw eQQ diff..... 1 1 mean eCDF diff........ 0.046632 0.008265 med eCDF diff........ 0.05197 0.0025873 max eCDF diff........ 0.087925 0.022208 var ratio (Tr/Co)..... 0.47573 0.9141 T-test p-value........ 3.2711e-07 0.80682 KS Bootstrap p-value.. 0.002 0.01 KS Naive p-value...... 0.047894 0.20285 KS Statistic.......... 0.087925 0.022208 Before Matching Minimum p.value: < 2.22e-16 Variable Name(s): AGE AGE2 WARD22 I(PERSONS * VOTE96.1) Number(s): 1 2 26 35 After Matching Minimum p.value: < 2.22e-16 Variable Name(s): AGE AGE2 Number(s): 1 2 > > proc.time() user system elapsed 54.899 0.476 55.569