Subject index Symbols angle() (axis-label suboption) . 124– ∆β . 274–275 125 ∆χ2 ...............................275 ANOVA ..................see regression β ..........see regression, standardized Anscombe quartet . 199, 201, 226 coefficient anycount() (egen function) . 88 *...............see do-files, comments append. .316–319 +........................see operators arithmeticmean...........see average //..............see do-files, comments arithmeticalexpressions............see #delimit . 36–37 expressions &........................see operators ascategory (graph dot option) . 149 N . 82–83, 95 ASCII files . .292–301 all. .47–48 ATS ...............................354 b[ ]..............................185 augmented component-plus-residual plot merge (variable). .310–312 .............204 n . 81–82, 95 autocode() (function).............152 | .........................see operators autocorrelation.........see regression, || ..................................104 autocorrelation ........................see operators average .. 15–16, 153, 156 ~ ........................see operators avplots . 207–208 aweight (weighting type) . 68–69 A axis labels . 107–108, 122–125 Academic Technology Service. .see ATS scales. .117–119 added-variable plot. .206–209 titles . 107–108, 126–127 additiveindex......................79 2 transformations. .118–119 adjusted count R . .266–267 adjusted R2 . .195–196 ado-directories.....................359 B ado-files balanced panel data . .312–313 basics . 335–337 bands() (twoway mband option) . 202– programming .. 337–351 203 aggregate .. see collapse bar (graph type). .105, 108, 146–147, AIC ................................267 159 Akaike’s information criterion. .see AIC bar charts . 146–147, 159 Aldrich–Nelson’s p2 ................326 batchjobs..................see do-files alphanumerical variables . .see strings Bayesian information criterion. .see analysis of variance . see regression BIC 370 Subject index Bernoulli’s distribution . see binomial command + . see commands, break distribution command line. .see windows, command beta.......see regression, standardized commands coefficient abbreviations . 14, 46–47 bias...............................200 access previous . 14 BIC ................................267 break..........................14 bin() (histogram option) . 164–165 e-class.........................71 binary variables. .see variables, dummy end of commands . 36–37 binomial distribution. .254–255 external . 45–46, 337, 354 BLUE ..see Gauss–Markov assumptions internal . 45–46, 337, 354 bookmaterials.....................2–3 long.......see do-files, line breaks bookstore..........................353 r-class..........................71 bootstrap .. 228–229 search..........................23 box (graph type) . 105, 161–163 comments.......see do-files, comments box plots . 22, 161–163 component-plus-residual plot . 203–204 Box–Coxtransformation...........227 compound quotes . 347–348 ...........................227 bcskew0 compress..........................319 break............see commands, break compute.................see generate browse.. .291–292 cond() (function).................347 by prefix. .18–19, 60–61, 81–86, 95, 156 conditional-effects plot . 222–223 by() (graph option)...............131 conditions..............see if qualifier by() (tabstat option).............157 confidence interval . 187–188 bysort .. 60–61 connect() (scatter option) . 112–115 byte(storagetype)................100 connected (plottype) . 112–115 see C contingencytable........ frequency tables, two-way calculator........see pocket calculator contract ...........................68 caption() (graph option) . 128–129 Cook’s D . 209–212 capture.. .38–39 categories .. 138–139 cooksd (predict option)..........209 cd . .9–10 correlation center.............see variables, center coefficient . 178–179 chi-squared negative...................... 178 likelihood-ratio................143 positive.......................178 Pearson.......................143 weak..........................178 2 classification tables. .264–267 count R . .265–267 clockposition......................121 covariate . see variables, independent cluster samples. .229–230 covariatepattern..................267 cmdlog .. 32–34 cplot .............................179 CMYK .............................111 cprplot . 203–204 CNEF ..............................317 Cramer’sV........................143 coefficient of determination . 191 cross-tabs...................see tables collapse ...........................81 .csv ...........see spreadsheet format comma-separated values. .see Ctrl + Break ....see commands, break spreadsheet format Ctrl + C ........see commands, break Subject index 371 cumulated probability function . see discrepancy . .210–211, 272–273 probit model discrete (histogram option) . 144 display.. .55, 328–329 D distributions Data Editor. .301–302 describe . 137–174 data matrix . 291–292 grouped . 150–152 dataregion........................107 do ..................................26 datatypes............see storage type do-files datasets analyzing......................40 ASCII files . 294–301 basics. .25–27 combine . 306, 308–319 comments......................36 describe . 11–12 create..........................40 export. .319–320 editors . .25–26 hierarchical .. 85, 313–316 error messages . 26–27 import . 293–294 execute........................26 load . 10–11 exit............................39 nonmachine-readable . 301–306 from interactive work . 29–34 oversized . 322–323 line breaks . .36–37 panel data. .232–233 master . .40–43 preserve........................66 organization .. 39–43 rectangular...................292 set more off. .37–38 reshape. .232–236 versioncontrol.................37 restore.........................66 doedit..........................25,30 save . 27–28, 319 dot (graph type) . 105, 148–149, sort. .14–15 159–161 titanic........................246 dot charts . 148–149, 159–161 dates double(storagetype)..............100 combiningdatasets............305 drop ............................12,48 elapsed dates . 93–94 dummyvariables.........see variables, fromstrings....................94 dummy degreesoffreedom..............see df delete.......................see erase E density . 163, 165–167 e() (saved results) . 71–72 describe.. .8–9, 11–12 e(b) (savedresult)................271 destring ...........................90 e-class..........see commands, e-class df.................................190 edit . 301–302 DFBETA . 205–206 egen . 87–88 dfbeta ............................206 EMF . 135–136 dictionary. .298–301 Encapsulated PostScript. .see EPS dir .............................10,27 encode .............................90 directory endogenous variable. .see variables, change . 9–10 dependent contents........................10 enhancedmetafile.............see EMF working directory . 3, 9–10, 58–59 Epanechnikov kernel . 167–168 discard ...........................337 EPS . 135–136 372 Subject index erase..........................43,310 functions...........................57 ereturn list ......................72 fweight (weighting type) . 66–68 error messages fxsize() (graph option). .133–134 ignore . 38–39 fysize() (graph option). .133–134 invalidsyntax..................17 error-components model. .240–242 G estat bootstrap .................228 gammacoefficient.................143 estat classification.. .265, 290 Gauss curve . see normal distribution estat dwatson ....................217 Gaussdistribution..........see normal estat effects ....................230 distribution estat gof .. .268, 290 Gauss–Markovassumptions........199 estat ic . 267, 277 GEE ...............................242 Excel files . .292–293 generalized estimation equations . see exit (inDo-Files)..................39 GEE exit Stata . 27–28 generate .. .24, 75–86 exogenousvariable.......see variables, generate() (tabulate option). .147, independent 219 expand .............................68 gladder (statistical graph) . 107 export............see datasets, export graph . .103–136 expressions .. 55–57 graph region . 107, 116 extensions..........................59 graphs 3D............................107 F combining . 132–134 F test . 191–192 connecting points . .113–114 FAQ ............................23,353 elements. .107–108 fence..............................162 export. .135–136 filenames . 58–59 multiple . 129–134 Fisher’sexacttest.................143 overlay .. 129–131 five-number summary . 156, 161 print . 134–135 fixed format. .298–301 titles . 128–129 fixed-effects model . 236–240 types . 104–107 float() (function)................101 weights.......................208 float(storagetype)................100 grid lines . .119, 124–125 foreach .. 61–64, 313 grouping forvalues .. 64–65 byquantiles...................151 free format. .296–298 intervals with arbitrary width. .152 frequencies intervals with same width . 151– absolute . 139–140 152 conditional . 141–142 GSOEP . 4, 11–12, 96–97, 229, 232, relative . 139–140 306–308, 317 frequency tables . 20–21 one-way . 139–140 H two-way .. 140–143 help . .22–24 frequencyweights..........see weights help files . 351–352 function (plottype)...............105 histogram.. .144–146, 163–165 Subject index 373 histogram (plottype)..............105 line (plottype) . 108, 112–115 homoskedasticity........see regression, linear combination . 180–181 homoskedasticity linear probability model . .see Hosmer–Lemeshowtest............268 regression, LPM Huber/White/sandwich estimator. .216 linearregression.........see regression linearity assumption . 202–204, I 268–272 if qualifier .