*! Help file for version 1.01 of pwqscope 11Mar2017 by Mead Over

Title

pwqscope -- Pairwise economies of scope -
Wrapper for qscope to facilitate the estimation of the
pairwise economies of scope between every pair of outputs
from a multi-output cost function with three or more outputs

Syntax

pwqscope
[if] [in]
,
[qscope options]

Options

outputs(varlist) List of the (untransformed) output variables.
Required >=3.

Other options Takes the same other options as qscope

Description

This program, pwqscope, uses the program qscope to estimate the
economies of scope between every pair of the output variables listed in the option
outputs(varlist). All pairwise estimates are evaluated at the first value of epsilon
in the qscope option epsilon(numlist). For each pairwise calculation,
other output variables, like all other right-hand-side variables,
are held constant at a point in sample space specified by qscope's
reference(stat) option.

Discussion

See the help file for qscope.

Examples

See the examples in the qscope help file.

Stored Results

In addition to the results returned by qscope, pwqscope returns the following results:

macros:
r(firstepsilon) : Value of epsilon at which pairwise economies of scope are estimated.

matrices:
r(pwscope) : Matrix of economies of scope between all pairs of the K specified outputs.
r(pwscopep) : Matrix of the p-values testing the hypothesis that each estimated economies of scope is zero.

References

Baumol, W.J., Panzar, J. and Willig, R. (1982).
Contestable markets and the theory of industrial structure.
Harcout Brace Javanovich Ltd., New York.

Pulley, L. B., & Humphrey, D. B. (1991). "Scope economies: Fixed costs,
complementarity, and functional form".
Federal Reserve Bank of Richmond Working Paper, (91-3).

Pulley, L. B. and Y. M. Braunstein (1992). "A composite cost function for
multiproduct firms with an application to economies of scope in banking",
Review of Economics and Statistics, 74(2), 221-30.

Authors

Contact Mead Over at:
Email: MOver@CGDev.Org if you observe any
problems.