hicksmoorsteen: Hicks-Moorsteen productivity and profitability index

In productivity: Indices of Productivity Using Data Envelopment Analysis (DEA)

Description

Using Data Envelopment Analysis (DEA), this function measures productivity and profitability in levels and changes with Hicks-Moorsteen index.

The Hicks-Moorsteen index is the geometric average of its components, i.e. Malmquist-hs and Malmquist-it indices.

Deflated shadow prices of inputs and outputs used to compute Malmquist-hs and Malmquist-it indices can also be returned.

Usage

hicksmoorsteen(data, id.var, time.var, x.vars, y.vars, w.vars = NULL, p.vars = NULL, 
  tech.change = TRUE, tech.reg = TRUE, rts = c("vrs", "crs", "nirs", "ndrs"), 
  orientation = c("out", "in", "in-out"), parallel = FALSE, cores = max(1, 
  detectCores() - 1), scaled = TRUE, components = FALSE)

## S3 method for class 'HicksMoorsteen'
print(x, digits = NULL, ...)

Arguments

data	A dataframe containing the required information for measuring productivity and profitability.
id.var	Firms' ID variable. Can be an integer or a text string.
time.var	Time period variable. Can be an integer or a text string.
x.vars	Input quantity variables. Can be a vector of text strings or integers.
y.vars	Output quantity variables. Can be a vector of text strings or integers.
w.vars	Input price variables (Optional). Can be a vector of text strings or integers. NULL by default, and in this case productivity only is measured.
p.vars	Output price variables (Optional). Can be a vector of text strings or integers. NULL by default, and in this case productivity only is measured.
tech.change	Logical. If TRUE (default), the model allows for technological change. If FALSE, technological change is prohibited. See also the Details section.
tech.reg	Logical. If TRUE (default), the model allows for negative technological change (i.e. technological regress). If FALSE, only positive technological change (i.e. technological progress) is allowed. See also the Details section.
rts	Character string specifying the returns to scale assumption. The default value is "vrs" (variable returns to scale). Other possible options are "crs" (constant returns to scale), "nirs" (non-increasing returns to scale), or "ndrs" (non-decreasing returns to scale).
orientation	Character string specifying the orientation. The default value is "out" (output-orientation). Other possible options are "in" (input-orientation), and "in-out" (both input- and output-orientations). For "in-out", the geometric mean of input- and output-orientations' results is returned.
parallel	Logical. Allows parallel computation. If FALSE (default) the estimation is conducted in sequential mode. If TRUE, parallel mode is activated using the number of cores specified in cores. When the sample size is small, it is recommended to keep the parallel option to its default value (FALSE).
cores	Integer. Used only if parallel = TRUE. It specifies the number of cores to be used for parallel computation. By default, cores = max(1, detectCores() - 1).
scaled	Logical. If TRUE (default), input and output quantities are rescaled. If FALSE, a warning message is displayed when very large (>1e5) and/or very small (<1e-4) values are present in the input and output quantity variables. See also the Details section.
components	Logical. Default is FALSE (only Hicks-Moorsteen indices are returned). When set to TRUE, the components Malmquist-hs and Malmquist-it indices are also returned (in terms of levels, changes, along with shadow prices used to compute Malmquist-hs and Malmquist-it).
x	An object of class 'HicksMoorsteen'.
digits	The minimum number of significant digits to be printed in values. Default = max(3, getOption("digits") - 3).
...	Currently not used.

Details

The Hicks-Moorsteen index is the geometric average of Malmquist-hs and Malmquist-it indices. For a firm i Malmquist-it computes the productivity index based on the reference year t. For a firm h, Malmquist-hs computes the productivity index based on the reference year s (i.e. t-1). Therefore, the Malmquist-it index uses the current period shadow prices as aggregators, while the Malmquist-hs index uses the previous period shadow prices as aggregators.

When tech.change is set to FALSE, this overrides the effect of tech.reg.

Setting scaled = FALSE (no rescaling of data) may lead to numerical problems in solving LP problems while optimizing DEA models. In extreme cases it may also prevent models from being optimized.

The Hicks-Moorsteen index is not transitive and therefore each firm is compared to itself in the previous period. Since there is no previous period for the first period, the results for this first period are replaced by NA.

Value

hicksmoorsteen() returns a list of class 'HicksMoorsteen' for which a summary of productivity and profitability (when price information is specified) measures in levels and changes is printed.

This list contains the following elements:

– HicksMoorsteen, containing levels and changes related to Hick-Moorsteen index per-se, with:

Levels

Several elements are provided, depending on the orientation specified: REV Revenues (when w.vars and p.vars are specified) COST Costs (when w.vars and p.vars are specified) PROF Profitability (when w.vars and p.vars are specified) P Aggregated output prices (when w.vars and p.vars are specified) W Aggregated input prices (when w.vars and p.vars are specified) TT Terms of trade (i.e. P/W) (when w.vars and p.vars are specified) AO Aggregated outputs AI Aggregated inputs TFP Total Factor Productivity (TFP) MP Maximum productivity TFPE TFP efficiency score OTE Output-oriented technical efficiency score (orientation = "out") OSE Output-oriented scale efficiency score (orientation = "out") OME Output-oriented mix efficiency score (orientation = "out") ROSE Residual output-oriented scale efficiency score (orientation = "out") OSME Output-oriented scale-mix efficiency score (orientation = "out") ITE Input-oriented technical efficiency score (orientation = "in") ISE Input-oriented scale efficiency score (orientation = "in") IME Input-oriented mix efficiency score (orientation = "in") RISE Residual input-oriented scale efficiency score (orientation = "in") ISME Input-oriented scale-mix efficiency score (orientation = "in") OTE.ITE Geometric mean of OTE and ITE (orientation = "in-out") OSE.ISE Geometric mean of OSE and ISE (orientation = "in-out") OME.IME Geometric mean of OME and IME (orientation = "in-out") ROSE.RISE Geometric mean of ROSE and RISE (orientation = "in-out") OSME.ISME Geometric mean of OSME and ISME (orientation = "in-out") RME Residual mix efficiency score

Changes

Change indices of the different elements of Levels are provided. Each change is prefixed by "d" (e.g. profitability change is denoted dPROF, output-oriented efficiency change is denoted dOTE, etc.).

– MalmquistHS, only returned when components = TRUE and accessible using Levels, Changes, and Shadowp, containing levels, changes, and shadow prices related to Malmquist-hs index, with:

Levels	Several elements are provided, depending on the orientation specified.
Changes	Change indices of the different elements of Levels.
Shadowp	For each observation, input (x.vars) and output (y.vars) deflated shadow prices used to compute Malmquist-hs index are returned.

– MalmquistIT, only returned when components = TRUE and accessible using Levels, Changes, and Shadowp, containing levels, changes, and shadow prices related to Malmquist-it index, with:

Levels	Several elements are provided, depending on the orientation specified.
Changes	Change indices of the different elements of Levels are provided.
Shadowp	For each observation, input (x.vars) and output (y.vars) deflated shadow prices used to compute Malmquist-it index are returned.

From an object of class 'HicksMoorsteen' obtained from hicksmoorsteen(), the

• Levels function extracts individual Hicks-Moorsteen productivity and profitability levels;

• Changes function extracts individual Hicks-Moorsteen productivity and profitability change indices; and

• Shadowp function extracts individual input and output deflated shadow prices of Malmquist-hs and Malmquist-it indices, when components = TRUE.

Warning

The hicksmoorsteen() function will not work with unbalanced panel data.

The Hicks-Moorsteen index may be sensitive to the rescaling.

The productivity levels are obtained using shadow prices computed using dual (multipliers) DEA models. However, for extreme efficient observations the issue of multiple solutions may arise and the values of shadow prices may differ depending on the linear programming solver used (here lpSolveAPI).

Note

All output-oriented efficiency scores are computed a la Shephard, while all input-oriented efficiency scores are computed a la Farrell. Hence, all efficiency scores are greater than zero and are lower or equal to one.

Author(s)

K Herv<c3><a9> Dakpo, Yann Desjeux, Laure Latruffe

References

Briec W., and Kerstens K. (2011). The Hicks-Moorsteen Productivity Index Satisfies the Determinateness Axiom. The Manchester School, 79(4), 765–775. https://doi.org/10.1111/j.1467-9957.2010.02169.x

Caves D.W., Christensen L.R., and Diewert W.E.(1982). The Economic Theory of Index Numbers and the Measurement of Input, Output, and Productivity. Econometrica, 50(6), 1393–1414. URL: http://www.jstor.org/stable/1913388

O'Donnell C.J. (2008), An aggregate quantity-price framework for measuring and decomposing productivity and profitability change. School of Economics, University of Queensland, Australia. URL: https://www.uq.edu.au/economics/cepa/docs/WP/WP072008.pdf

O'Donnell C.J. (2010). Measuring and decomposing agricultural productivity and profitability change. Australian Journal of Agricultural and Resource Economics, 54(4), 527–560. https://doi.org/10.1111/j.1467-8489.2010.00512.x

O'Donnell C.J. (2011), The sources of productivity change in the manufacturing sectors of the U.S. economy. School of Economics, University of Queensland, Australia. URL: http://www.uq.edu.au/economics/cepa/docs/WP/WP072011.pdf

See Also

See Levels to retrieve Hicks-Moorsteen (along with Malmquist-hs and Malmquist-it) productivity and profitability in levels and components.
See Changes to retrieve Hicks-Moorsteen (along with Malmquist-hs and Malmquist-it) productivity and profitability changes and components.
See Shadowp to retrieve deflated input and output shadow prices of Malmquist-hs and Malmquist-it.

Examples

## Hicks-Moorsteen productivity, without price information
## Not run: 
  Hicks1 <- hicksmoorsteen(data = usagri, id.var = "States", time.var = "Years", x.vars = c(7:10), 
  y.vars = c(4:6), rts = "crs", orientation = "in")
  Hicks1

## End(Not run)
## Hicks-Moorsteen productivity and profitability, with price information
## Not run: 
Hicks2 <- hicksmoorsteen(data = usagri, id.var = "States", time.var = "Years", 
  x.vars = c(7:10), y.vars = c(4:6), w.vars = c(14:17), p.vars = c(11:13))
  Hicks2

## End(Not run)

productivity documentation built on May 2, 2019, 4:44 p.m.