Subject index. Symbols Δβ Δχ β...see regression, standardized coefficient *... see do-files, comments

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1 Subject index Symbols Δβ Δχ β...see regression, standardized coefficient *... see do-files, comments +...see operators //... see do-files, comments &...see operators...see operators...see operators ~...see operators A Academic Technology Service.. see ATS added-variable plot additive index...77 adjusted count R adjusted R ado-directories ado-files basics programming aggregate....see collapse AIC Akaike s information criterion.. see AIC Aldrich Nelson s p all...43 alphanumerical variables.... see strings analysis of variance...see regression angle() (axis-label suboption) ANOVA...see regression Anscombe quartet , 206, 231 anycount() (egen function) append arithmetic mean...see average arithmetical expressions...see expressions ascategory (graph dot option) ASCII files ATS augmented component-plus-residual plot autocode() (function) autocorrelation...see regression, autocorrelation average , , avplots aweight (weight type) axis labels , scales titles , transformations B b[ ] balanced panel data bands() (twoway mband option) bar (graph type) , 109, , 164 bar charts , 164 batch jobs...see do-files Bayesian information criterion....see BIC Bernoulli s distribution... see binomial distribution beta...see regression, standardized coefficient bias BIC...271

2 380 Subject index bin() (histogram option) binary variables..see variables, dummy binomial distribution BLUE..see Gauss Markov assumptions book materials......xxii xxiii bookstore bootstrap box (graph type) , box plots...16, Box Cox transformation bcskew break... see commands, break browse by prefix , 55 56, 79 83, 93, 161 by() (graph option) by() (tabstat option) bysort...56 byte (storage type) C calculator see pocket calculator caption() (graph option) capture...34 categories cd center...see variables, center chi-squared likelihood-ratio Pearson classification tables clock position cluster samples cmdlog CMYK CNEF coefficient of determination collapse...79 comma-separated values....see spreadsheet format command +....see commands, break command line.... see windows, Command window commands abbreviations.....8, access previous...8 commands, continued break... 8 e-class end of commands external , 345, 364 internal , 345, 364 long... see do-files, line breaks r-class...67 search...17 comments....see do-files, comments component-plus-residual plot compound quotes compress compute...see generate cond() (function) conditional-effects plot conditions....see if qualifier confidence interval connect() (scatter option) connected (plottype) contingency table....see frequency tables, two-way contract...63 Cook s D cooksd (predict option) correlation coefficient negative positive weak count R covariate.... see variables, independent covariate pattern cplot cprplot Cramér s V csv...see spreadsheet format Ctrl+Break...see commands, break Ctrl+C... see commands, break cumulated probability function.... see probit model D Data Editor data matrix

3 Subject index 381 data region data types...see storage types datasets ASCII files combine , describe export hierarchical...82, import load nonmachine-readable oversized panel data preserve...62 rectangular reshape restore...62 save , 326 sort titanic dates from strings dates, combining datasets by elapsed degrees of freedom...see df delete...see erase #delimit...32 density , describe...2 3, 5 6 destring df DFBETA dfbeta dictionary dir...4, 21 directory change contents...4 working directory.... xxiii, 3 4, 54 discard discrepancy , 276 discrete (histogram option) display...50, distributions describe grouped do...20 do-files analyzing basics comments create editors error messages execute...20 exit from interactive work line breaks master organization set more off...33 version control...33 doedit...19, 26 dot (graph type) , , dot charts , double (storage type)...95, 101 drop...6, 43 dummy variables...see variables, dummy E e() (saved results) e(b) (saved result) e-class... see commands, e-class edit egen elapsed dates...see dates, elapsed elapsed time... see time, elapsed EMF Encapsulated PostScript....see EPS encode endogenous variable...see variables, dependent enhanced metafile....see EMF Epanechnikov kernel

4 382 Subject index EPS erase...39, 316 ereturn list...68 error messages ignore...34 invalid syntax error-components model estat bootstrap estat classification estat dwatson estat effects estat gof estat ic...271, 281 Excel files exit (in do-files) exit Stata exogenous variable...see variables, independent expand...63 expected value export... see datasets, export expressions extensions...54 F F test FAQ...17, 363 fence filenames Fisher s exact test five-number summary...160, 166 fixed format fixed-effects model float() (function) float (storage type) foreach , 319, 353 levelsof forvalues...60 free format frequencies absolute conditional relative frequency tables one-way two-way frequency weights....see weights function (plottype) functions fweight (weight type) fxsize() (graph option) fysize() (graph option) G gamma coefficient Gauss curve... see normal distribution Gauss distribution....see normal distribution Gauss Markov assumptions GEE generalized estimation equations... see GEE generate...18, generate() (tabulate option) , 224 gladder (statistical graph) graph graph region , 117 graphs 3-D combining connecting points editor , , elements export multiple overlay print titles types weights grid lines...120, grouping by quantiles intervals with arbitrary width..157 intervals with same width

5 Subject index 383 GSOEP...xxiii, 5 6, 97 98, 234, 237, , 324 H help help files histogram , histogram (plottype) homoskedasticity....see regression, homoskedasticity Hosmer Lemeshow test Huber/White/sandwich estimator..221 I if qualifier...11, imargin() (graph combine option) importing... see data, import in qualifier , infile influential cases , input inputting data insheet inspect interaction terms , invnormal() (function) iscale() (graph combine option) iteration block K kdensity Kendall s tau-b kernel density estimator key variable L label data labels and values datasets display values...15, 99 variables...15, legend , leverage , 276 lfit (plottype) likelihood likelihood-ratio χ likelihood-ratio test , limits....3 line (plottype) , linear probability model....see regression, LPM linear regression...see regression linearity assumption , list local...69, local macro...see macro local mean regression loess...see LOWESS log() (function) log (scale suboption) log files finish recording...34 interrupt recording...28 log commands SMCL start recording logarithm logical expressions...see expressions logistic logistic regression coefficients command dependent variable diagnostic estimation fit marginal effect logit logit model.... see logistic regression logits loops foreach forvalues...60 lower() (function) LOWESS...209,

6 384 Subject index lowess (plottype) lowess (statistical graph) LPM... see regression, LPM M macro extended macro functions local , manuals...xxiv margin() (graph option) marker colors labels...107, options sizes symbols , master data match.... see datasets, combine matrix (command) matrix (graph type) , , 210 maximum...10, maximum likelihood principle search domain mband (plottype) mean...see average median median regression , median-trace memory...see RAM merge merge (variable) meta data minimum...10, missing encode...97 missing (tabulate option) missing values... see missings missings coding definition in expressions set , ML...see maximum likelihood mlabel() (scatter option) mlabposition() (scatter option) mlabsize() (scatter option) mlabvposition() (scatter option) MLE...see maximum likelihood mlogit more off...33 MSS multicollinearity , multinomial logistic regression mvdecode...12, 97 mvencode...97 N N , 93 n , 93 net install NetCourses newlist nonlinear relationships , normal distribution density density function note() (graph option) notes...98 null model numlabel numlist...53, 59 O observations definition....6 list odds odds ratio , odds-ratio interpretation OLS operators options , 45 46

7 Subject index 385 order ordered logistic regression...see proportional-odds model ordinal logit model....see proportional-odds model ordinary least squares...see OLS P package description panel data... see datasets, panel data PanelWhiz partial correlation... see regression, standardized coefficient partial regression plot see added-variable plot partial residual plot....see component-plus-residual plot PDF Pearson residual Pearson-χ percentiles... see quantiles PICT pie (graph type)...105, 152, 164 pie charts...152, 164 plot region , 117 plotregion() (graph option) PNG pocket calculator...50 portable document format...see PDF PostScript...see PS ppfad.dta predict predicted values Pregibon s Δβ...see Δβ preserve...62 probability interpretation , 266 probit probit model program define program drop programs and do-files debugging , 351 defining in do-files programs, continued naming redefining syntax , proportional-odds model PS pseudo R PSID...313, 324 pwd...21, 54 pweight (weight type) Q quantile plot quantile regression quantiles quartiles quietly Q Q plots R r...see correlation coefficient r() (saved results) r(max) (saved result) r(mean) (saved result) r(mean) (saved result)...59 r(min) (saved result)...67 r(n) (saved result) r(sd) (saved result) r(sum) (saved result)...67 r(sum w) (saved result)...67 r(var) (saved result) r-class...see commands, r-class R RAM...3, random numbers , 75 random-effects model range() (scale suboption) RAW raw data...see RAW recode... see variables, replace recode() (function) recode...84 reference lines , 120 regress...19, 188

8 386 Subject index regression ANOVA table autocorrelation coefficient , command , control diagnostics fit homoskedasticity linear...19, LPM multiple nonlinear relationships omitted variables panel data residuals simple standard error standardized coefficient with heteroskedasticity replace...18, reshape residual (predict option) residual definition sum...187, 194 residual sum of squares...see RSS residual-versus-fitted plot , , 232 response variable...see variables, dependent restore...62 Results window.. see windows, Results window return list...68 reverse (scale suboption) Review window.. see windows, Review window RGB root MSE round() (function) rowmiss() (egen function) RSS rstudent (predict option) runiform() (function) , 75 running counter running sum rvfplot S sampling weights...see weights SAS files save , 326 saved results...59, 67 70, , 275 scatter (plottype) , 109 scatterplot scatterplot matrix , 210 scatterplot smoother search sensitivity separate sign interpretation SJ...17, 363 SJ-ados SMCL , 360 SOEP...see GSOEP sort sort (scatter option) specificity spreadsheet format SPSS files SSC ssc install SSC-ados standard deviation , 158 Stata Journal Stata Press Stata Technical Bulletin stata.toc Statalist statistical inference , STB...17, 363 STB-ados stereotype model storage types , strings...303, 311 display format in expressions...88 replace substrings storage type

9 Subject index 387 strings, continued to dates to numeric strpos() (function) subinstr() (function) subscripts substr() (function) subtitle() (graph option) sum() (function) summarize , 160 summarize() (tabulate option) summary graphs summary tables superposition...153, survey data svmat svy symmetry plot symplot (statistical graph) syntax , syntax checks syntax diagram T tab-separated values... see spreadsheet format tab tab table tabstat tabulate tagged-image file format.....see TIFF tau-b...see Kendall s tau-b tempvar text() (twoway option) textbox options tick lines , TIFF time from strings time, elapsed title() (graph option) total sum of squares...see TSS total variance....see TSS trace TSS two-way table...see frequency tables, two-way twoway (graph type) U U-shaped relationship , 231 unbalanced panel data uniform() (function)..see runiform() (function) update updating Stata upper() (function) use using using data V V...see Cramér s V value labels... see labels, values valuelabel (axis-label suboption) variable list... see variables, varlist variables all...43 allowed names categorical center , 59, 68, 199, 226 definition....6 delete... 6, 43 dependent dummy , 151, 198, , generate...18, group identifier independent multiple codings names...98 ordinal replace...18, temporary transformations , 209, 218, 221, varlist...8, 43 45

10 388 Subject index Variables window...see windows, Variables window variance...see standard deviation variance of residuals...see RSS variation varlist... see variables, varlist vce(robust) version...33 view yline() (twoway option) ytick() (twoway option) yscale() (twoway option) ysize() (graph option) ytick() (twoway option) ytitle() (twoway option) Z zip archive...xxiii W webuse...xxiv weights whisker wildcards...44 windows change...20 Command window... 1 font sizes...2 preferences....2 Results window...1 Review window...1, 8 scroll back... 4 Variables window...1 windows metafile...see WMF WMF working directory...see directory, working directory wstata.exe X xi: xlabel() (twoway option) xline() (twoway option) xtick() (twoway option) xscale() (twoway option) xsize() (graph option) xt commands xtgee xtick() (twoway option) xtitle() (twoway option) xtreg , 247 Y ylabel() (twoway option)

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Subject index. Symbols β χ β...see regression, standardized coefficient *... see do-files, comments

Subject index. Symbols β χ β...see regression, standardized coefficient *... see do-files, comments Subject index Symbols β... 375 376 χ 2... 376 377 β...see regression, standardized coefficient *... see do-files, comments +... see operators ==... see operators //... see do-files, comments # (factor-variable