• using R version 2.13.0 Under development (unstable) (2011-03-07 r54691)
• using platform: i386-apple-darwin9.8.0 (32-bit)
• using session charset: ASCII
• checking for file 'AER/DESCRIPTION' ... OK
• this is package 'AER' version '1.1-7'
• checking package name space information ... OK
• checking package dependencies ... NOTE
  Package suggested but not available for checking: mlogit
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• checking package directory ... OK
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• checking for sufficient/correct file permissions ... OK
• checking DESCRIPTION meta-information ... OK
• checking top-level files ... OK
• checking index information ... OK
• checking package subdirectories ... OK
• checking R files for non-ASCII characters ... OK
• checking R files for syntax errors ... OK
• checking whether the package can be loaded ... OK
• checking whether the package can be loaded with stated dependencies ... OK
• checking whether the package can be unloaded cleanly ... OK
• checking whether the name space can be loaded with stated dependencies ... OK
• checking whether the name space can be unloaded cleanly ... OK
• checking for unstated dependencies in R code ... OK
• checking S3 generic/method consistency ... OK
• checking replacement functions ... OK
• checking foreign function calls ... OK
• checking R code for possible problems ... OK
• checking Rd files ... OK
• checking Rd metadata ... OK
• checking Rd cross-references ... OK
• checking for missing documentation entries ... OK
• checking for code/documentation mismatches ... OK
• checking Rd \usage sections ... OK
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• checking for unstated dependencies in examples ... OK
• checking contents of 'data' directory ... OK
• checking data for non-ASCII characters ... OK
• checking data for ASCII and uncompressed saves ... OK
• checking sizes of PDF files under inst/doc ... OK
• checking examples ... ERROR
  Running examples in 'AER-Ex.R' failed
  The error most likely occurred in:
  
  > ### Name: BankWages
  > ### Title: Bank Wages
  > ### Aliases: BankWages
  > ### Keywords: datasets
  >
  > ### ** Examples
  >
  > data("BankWages")
  >
  > ## exploratory analysis of job ~ education
  > ## (tables and spine plots, some education levels merged)
  > xtabs(~ education + job, data = BankWages)
  job
  education custodial admin manage
  8 13 40 0
  12 13 176 1
  14 0 6 0
  15 1 111 4
  16 0 24 35
  17 0 3 8
  18 0 2 7
  19 0 1 26
  20 0 0 2
  21 0 0 1
  > edcat <- factor(BankWages$education)
  > levels(edcat)[3:10] <- rep(c("14-15", "16-18", "19-21"), c(2, 3, 3))
  > tab <- xtabs(~ edcat + job, data = BankWages)
  > prop.table(tab, 1)
  job
  edcat custodial admin manage
  8 0.245283019 0.754716981 0.000000000
  12 0.068421053 0.926315789 0.005263158
  14-15 0.008196721 0.959016393 0.032786885
  16-18 0.000000000 0.367088608 0.632911392
  19-21 0.000000000 0.033333333 0.966666667
  > spineplot(tab, off = 0)
  > plot(job ~ edcat, data = BankWages, off = 0)
  >
  > ## fit multinomial model for male employees
  > library("nnet")
  > fm_mnl <- multinom(job ~ education + minority, data = BankWages,
  + subset = gender == "male", trace = FALSE)
  > summary(fm_mnl)
  Call:
  multinom(formula = job ~ education + minority, data = BankWages,
  subset = gender == "male", trace = FALSE)
  
  Coefficients:
  (Intercept) education minorityyes
  admin -4.760725 0.5533995 -0.4269495
  manage -30.774855 2.1867717 -2.5360409
  
  Std. Errors:
  (Intercept) education minorityyes
  admin 1.172774 0.09904108 0.5027084
  manage 4.478612 0.29483562 0.9342070
  
  Residual Deviance: 237.472
  AIC: 249.472
  > confint(fm_mnl)
  , , admin
  
  2.5 % 97.5 %
  (Intercept) -7.0593203 -2.4621301
  education 0.3592825 0.7475164
  minorityyes -1.4122398 0.5583409
  
  , , manage
  
  2.5 % 97.5 %
  (Intercept) -39.552774 -21.9969368
  education 1.608904 2.7646389
  minorityyes -4.367053 -0.7050288
  
  >
  > ## same with mlogit package
  > library("mlogit")
  Error in library("mlogit") : there is no package called 'mlogit'
  Execution halted
• elapsed time (check, wall clock): 0:55