aidsPx {micEcon}R Documentation

Price Index for the AIDS

Description

Calculate log price indices for the AIDS and LA-AIDS.

Usage

   aidsPx( px, priceNames, shareNames = NULL, data = NULL, base = 1, coef = NULL,
      alpha0 = ifelse( is.null( coef$alpha0 ), 0, coef$alpha0 ) )

Arguments

px the price index to be used (see details).
priceNames a vector of strings containing the names of the prices.
shareNames a vector of strings containing the names of the expenditure shares.
data a data frame containing the data.
base the base to calculate the indices (see details).
coef a list containing the coefficients alpha, beta and gamma (only needed for the translog price index).
alpha0 coefficient α_0 of the translog price index.

Details

Currently 6 different price indices are implemented: begin{itemize}

  • translog price index ('TL'),
  • Stone price index ('S'),
  • Stone price index with lagged shares ('SL'),
  • loglinear analogue to the Paasche price index ('P'),
  • loglinear analogue of the Laspeyres price index ('L'), and
  • Tornqvist price index ('T'). end{itemize}

    The argument base can be either begin{itemize}

  • a single number: the row number of the base prices and quantities,
  • a vector indicating several observations: The means of these observations are used as base prices and quantities, or
  • a logical vector with the same length as the data: The means of the observations indicated as 'TRUE' are used as base prices and quantities. end{itemize}

    Value

    a vector containing the log price index.

    Author(s)

    Arne Henningsen ahenningsen@agric-econ.uni-kiel.de

    References

    Deaton, A.S. and J. Muellbauer (1980) An Almost Ideal Demand System. American Economic Review, 70, p. 312-326.

    Moschini, G. (1995) Units of Measurement and the Stone Index in Demand System Estimation. American Journal of Agricultural Economics, 77, p. 63-68.

    See Also

    aidsEst

    Examples

       data( Blanciforti86 )
       aidsPx( "S", c( "pFood1", "pFood2", "pFood3", "pFood4" ),
          c( "wFood1", "wFood2", "wFood3", "wFood4" ), Blanciforti86 )
    

    [Package micEcon version 0.3-3 Index]