Journal Of The Econometric Society

An International Society for the Advancement of Economic
Theory in its Relation to Statistics and Mathematics

Edited by: Guido W. Imbens • Print ISSN: 0012-9682 • Online ISSN: 1468-0262

Econometrica: Jul, 1968, Volume 36, Issue 3

Short-Run Employment Variation on Class-I Railroads in the U.S., 1947-1963<511:SEVOCR>2.0.CO;2-G
p. 511-529

Sherwin Rosen

Two hypotheses concerning short-run employment variation are put forth, one relating to the extent of specific investment in workers and the other to substitution with fixed factors. Both are used to explain occupational (skill) differences in short-run employment experience among railroad workers. Implications of these investments for the demand, variability, and timing of hours of work per man are developed and tested, and substitution parameters are estimated from cross-section data.

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