Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  'model.frame'
Paneldata.formula: no visible global function definition for
  'model.matrix'
Paneldata.formula: no visible global function definition for
  'model.response'
summary.Paneldata: no visible global function definition for 'coef'
summary.Paneldata: no visible global function definition for 'pt'
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  ‘model.frame’
Paneldata.formula: no visible global function definition for
  ‘model.matrix’
Paneldata.formula: no visible global function definition for
  ‘model.response’
summary.Paneldata: no visible global function definition for ‘coef’
summary.Paneldata: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  ‘model.frame’
Paneldata.formula: no visible global function definition for
  ‘model.matrix’
Paneldata.formula: no visible global function definition for
  ‘model.response’
summary.Paneldata: no visible global function definition for ‘coef’
summary.Paneldata: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  ‘model.frame’
Paneldata.formula: no visible global function definition for
  ‘model.matrix’
Paneldata.formula: no visible global function definition for
  ‘model.response’
summary.Paneldata: no visible global function definition for ‘coef’
summary.Paneldata: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  'model.frame'
Paneldata.formula: no visible global function definition for
  'model.matrix'
Paneldata.formula: no visible global function definition for
  'model.response'
summary.Paneldata: no visible global function definition for 'coef'
summary.Paneldata: no visible global function definition for 'pt'
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  ‘model.frame’
Paneldata.formula: no visible global function definition for
  ‘model.matrix’
Paneldata.formula: no visible global function definition for
  ‘model.response’
summary.Paneldata: no visible global function definition for ‘coef’
summary.Paneldata: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  ‘model.frame’
Paneldata.formula: no visible global function definition for
  ‘model.matrix’
Paneldata.formula: no visible global function definition for
  ‘model.response’
summary.Paneldata: no visible global function definition for ‘coef’
summary.Paneldata: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  ‘model.frame’
Paneldata.formula: no visible global function definition for
  ‘model.matrix’
Paneldata.formula: no visible global function definition for
  ‘model.response’
summary.Paneldata: no visible global function definition for ‘coef’
summary.Paneldata: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  ‘model.frame’
Paneldata.formula: no visible global function definition for
  ‘model.matrix’
Paneldata.formula: no visible global function definition for
  ‘model.response’
summary.Paneldata: no visible global function definition for ‘coef’
summary.Paneldata: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  'model.frame'
Paneldata.formula: no visible global function definition for
  'model.matrix'
Paneldata.formula: no visible global function definition for
  'model.response'
summary.Paneldata: no visible global function definition for 'coef'
summary.Paneldata: no visible global function definition for 'pt'
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  ‘model.frame’
Paneldata.formula: no visible global function definition for
  ‘model.matrix’
Paneldata.formula: no visible global function definition for
  ‘model.response’
summary.Paneldata: no visible global function definition for ‘coef’
summary.Paneldata: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  ‘model.frame’
Paneldata.formula: no visible global function definition for
  ‘model.matrix’
Paneldata.formula: no visible global function definition for
  ‘model.response’
summary.Paneldata: no visible global function definition for ‘coef’
summary.Paneldata: no visible global function definition for ‘pt’
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.
Malformed Description field: should contain one or more complete sentences.
Paneldata.formula: no visible global function definition for
  'model.frame'
Paneldata.formula: no visible global function definition for
  'model.matrix'
Paneldata.formula: no visible global function definition for
  'model.response'
summary.Paneldata: no visible global function definition for 'coef'
summary.Paneldata: no visible global function definition for 'pt'
Undefined global functions or variables:
  coef model.frame model.matrix model.response pt
Consider adding
  importFrom("stats", "coef", "model.frame", "model.matrix",
             "model.response", "pt")
to your NAMESPACE file.