Changes {productivity}

Productivity and profitability change indices

Description

This function extracts individual productivity and profitability (when available) change indices from any object created by either fareprim, fisher, hicksmoorsteen, laspeyres, lowe, malm, or paasche function.

Usage

Changes(object, ...)

Arguments

object

Object of class ⁠'FarePrimont'⁠, ⁠'Fisher'⁠, ⁠'HicksMoorsteen'⁠, ⁠'Laspeyres'⁠, ⁠'Lowe'⁠, ⁠'Malmquist'⁠, or ⁠'Paasche'⁠.

...

Currently not used.

Details

• An object of class ⁠'FarePrimont'⁠ is a result of a call to fareprim.

• An object of class ⁠'Fisher'⁠ is a result of a call to fisher.

• An object of class ⁠'HicksMoorsteen'⁠ is a result of a call to hicksmoorsteen.

• An object of class ⁠'Laspeyres'⁠ is a result of a call to laspeyres.

• An object of class ⁠'Lowe'⁠ is a result of a call to lowe.

• An object of class ⁠'Malmquist'⁠ is a result of a call to malm.

• An object of class ⁠'Paasche'⁠ is a result of a call to paasche.

Value

• In the case of Färe-Primont, Fisher, Laspeyres, Lowe, Malmquist, and Paasche indices, the function returns a data frame containing all the elements and observations included in the "Changes" component of object.

• In the case of Hicks-Moorsteen index:

  • When components = FALSE (default) in the call to hicksmoorsteen, the function returns a data frame containing all the elements and observations included in the "Changes" component of the object of class ⁠'HicksMoorsteen'⁠.

  • When components = TRUE in the call to hicksmoorsteen, the function returns a list of three data frames:

    * HicksMoorsteen:

    A data frame containing all the elements and observations related to "Changes" component of the Hicks-Moorsteen index.

    * MalmquistHS:

    A data frame containing all the elements and observations related to "Changes" component of the Malmquist-hs index.

    * MalmquistIT:

    A data frame containing all the elements and observations related to "Changes" component of the Malmquist-it index.

Author(s)

Yann Desjeux, K Hervé Dakpo, Laure Latruffe

See Also

For details and information on returned values, see fareprim, fisher, hicksmoorsteen, laspeyres, lowe, malm, or paasche.

See also:
- Levels for productivity and profitability levels; and
- Shadowp for shadow prices.

Examples

## Not run: 
  FAREPRIM <- fareprim(data = usagri, id.var = "States", time.var = "Years", 
  x.vars = c("q.capital", "q.land","q.labor","q.materials"), y.vars = c("q.livestock", 
  "q.crop", "q.other"), w.vars = c("p.capital", "p.land", "p.labor", "p.materials"), 
  p.vars = c("p.livestock", "p.crop", "p.other"))
  Fareprim.change <- Changes(FAREPRIM)
  head(Fareprim.change)

## End(Not run)