df.residual.mlogit: no visible global function definition for
  ‘residuals’
df.residual.mlogit: no visible global function definition for ‘coef’
drpar.mlogit: no visible global function definition for ‘coef’
drpar.rpar : <anonymous>: no visible global function definition for
  ‘dnorm’
drpar.rpar : <anonymous>: no visible global function definition for
  ‘dlnorm’
effects.mlogit: no visible global function definition for ‘predict’
effects.mlogit: no visible global function definition for ‘formula’
effects.mlogit : <anonymous>: no visible global function definition for
  ‘na.omit’
effects.mlogit: no visible global function definition for ‘coef’
has.intercept.Formula : <anonymous>: no visible global function
  definition for ‘formula’
has.intercept.default: no visible global function definition for
  ‘formula’
has.intercept.formula: no visible global function definition for
  ‘terms’
hmftest.mlogit: no visible global function definition for ‘update’
hmftest.mlogit: no visible global function definition for ‘coef’
hmftest.mlogit: no visible global function definition for ‘vcov’
hmftest.mlogit: no visible global function definition for ‘pchisq’
index.mlogit: no visible global function definition for ‘model.frame’
lnl.mprobit : mills: no visible global function definition for ‘dnorm’
lnl.mprobit : mills: no visible global function definition for ‘pnorm’
lnl.mprobit: no visible global function definition for ‘na.omit’
lnl.mprobit: no visible global function definition for ‘runif’
lnl.mprobit: no visible global function definition for ‘qnorm’
lnl.mprobit: no visible global function definition for ‘pnorm’
lnl.mprobit: no visible binding for global variable ‘pnorm’
lnl.mprobit: no visible global function definition for ‘dnorm’
lratio: no visible global function definition for ‘logLik’
lratio: no visible global function definition for ‘coef’
lratio: no visible global function definition for ‘pchisq’
lrtest.mlogit: no visible global function definition for ‘update’
make.beta: no visible global function definition for ‘pnorm’
make.random.nb: no visible global function definition for ‘qnorm’
make.random.nb: no visible global function definition for ‘rnorm’
mean.mlogit: no visible global function definition for ‘coef’
mean.rpar: no visible global function definition for ‘dnorm’
mean.rpar: no visible global function definition for ‘pnorm’
med.mlogit: no visible global function definition for ‘coef’
mlogit: no visible global function definition for ‘relevel’
mlogit: no visible global function definition for ‘model.response’
mlogit: no visible global function definition for ‘na.omit’
mlogit: no visible global function definition for ‘model.matrix’
mlogit: no visible global function definition for ‘coef’
mlogit.data: no visible global function definition for ‘reshape’
model.frame.mFormula: no visible global function definition for
  ‘model.frame’
model.matrix.mFormula: no visible global function definition for
  ‘na.omit’
model.matrix.mFormula: no visible global function definition for
  ‘update’
model.matrix.mFormula: no visible global function definition for
  ‘model.matrix’
model.matrix.mFormula: no visible global function definition for
  ‘as.formula’
model.matrix.mlogit: no visible global function definition for
  ‘model.matrix’
plot.mlogit: no visible global function definition for ‘coef’
plot.mlogit: no visible global function definition for ‘plot’
plot.rpar: no visible global function definition for ‘plot’
plot.rpar: no visible global function definition for ‘polygon’
plot.rpar: no visible global function definition for ‘segments’
plot.rpar: no visible global function definition for ‘lines’
plot.rpar: no visible global function definition for ‘title’
predict.mlogit: no visible global function definition for ‘model.frame’
predict.mlogit: no visible global function definition for ‘update’
predict.mlogit: no visible global function definition for ‘coef’
print.mlogit: no visible global function definition for ‘coef’
print.summary.mlogit: no visible global function definition for
  ‘printCoefmat’
prpar.mlogit: no visible global function definition for ‘coef’
prpar.rpar : <anonymous>: no visible global function definition for
  ‘pnorm’
prpar.rpar : <anonymous>: no visible global function definition for
  ‘plnorm’
prpar.rpar : <anonymous>: no visible global function definition for
  ‘punif’
qrpar.mlogit: no visible global function definition for ‘coef’
qrpar.rpar : <anonymous>: no visible global function definition for
  ‘qnorm’
qrpar.rpar : <anonymous>: no visible global function definition for
  ‘qlnorm’
qrpar.rpar : <anonymous>: no visible global function definition for
  ‘qunif’
residuals.mlogit: no visible global function definition for
  ‘model.response’
rg.mlogit: no visible global function definition for ‘coef’
rpar: no visible global function definition for ‘coef’
rpar : <anonymous>: no visible global function definition for ‘coef’
scoretest.default: no visible global function definition for ‘coef’
scoretest.default: no visible global function definition for ‘formula’
scoretest.default: no visible global function definition for ‘update’
scoretest.default: no visible global function definition for ‘pchisq’
scoretest.mlogit: no visible global function definition for ‘coef’
scoretest.mlogit: no visible global function definition for
  ‘model.matrix’
scoretest.mlogit: no visible global function definition for ‘pchisq’
stdev.mlogit: no visible global function definition for ‘coef’
stdev.rpar: no visible global function definition for ‘pnorm’
stdev.rpar: no visible global function definition for ‘dnorm’
summary.mlogit: no visible global function definition for ‘coef’
summary.mlogit: no visible global function definition for ‘vcov’
summary.mlogit: no visible global function definition for ‘pnorm’
terms.mlogit: no visible global function definition for ‘terms’
update.mlogit: no visible global function definition for ‘update’
update.mlogit: no visible global function definition for ‘formula’
waldtest.mlogit: no visible global function definition for
  ‘model.matrix’
waldtest.mlogit: no visible global function definition for ‘coef’
waldtest.mlogit: no visible global function definition for ‘vcov’
waldtest.mlogit: no visible global function definition for ‘pchisq’
Undefined global functions or variables:
  as.formula coef dlnorm dnorm formula lines logLik model.frame
  model.matrix model.response na.omit pchisq plnorm plot pnorm polygon
  predict printCoefmat punif qlnorm qnorm qunif relevel reshape
  residuals rnorm runif segments terms title update vcov
Consider adding
  importFrom("graphics", "lines", "plot", "polygon", "segments", "title")
  importFrom("stats", "as.formula", "coef", "dlnorm", "dnorm", "formula",
             "logLik", "model.frame", "model.matrix", "model.response",
             "na.omit", "pchisq", "plnorm", "pnorm", "predict",
             "printCoefmat", "punif", "qlnorm", "qnorm", "qunif",
             "relevel", "reshape", "residuals", "rnorm", "runif",
             "terms", "update", "vcov")
to your NAMESPACE file.