Postprint version. Published in Applied Economics, Volume 15, Issue 6, December 1, 1983, pages 815-820.
NOTE: At the time of publication, the author Michael L. Marlow was not yet affiliated with Cal Poly.
The definitive version is available at https://doi.org/10.1080/00036848300000068.
1983 Taylor & Francis.
This is an electronic version of an article published in Applied Economics.