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On The Economics Of The Jockey Club’S 140 Mare Limit Proposal, Robert L. Losey Ph.D.

Faculty Scholarship

Though the genetics and economic aspects of the Jockey Club proposal are intertwined, as much as possible this paper focuses on the economic implications of a limit on the number of mares a stallion can breed. Jim Gagliano, president of the Jockey Club, was quoted in a September 6, 2019, Thoroughbred Daily News article saying, “We cannot predict the economic effects of a limitation because of the complexity of the interactions among participants in the breeding and selling markets.” As explained in the following, significant economic consequences are predictable with considerable accuracy. Most especially in the short and intermediate …

Incremental Changes In Inbreeding When Comparing Stallion Pedigrees From The Years 2000 And 2020, Robert L. Losey Ph.D., Thomas E. Lambert 1959-

Faculty Scholarship

This paper has been written in response to the Jockey Club’s proposal to limit the number of mares bred by any individual Thoroughbred stallion. The paper has three goals:

1) To provide a statistical analysis of the degree to which inbreeding in Thoroughbreds has increased over the last twenty years.

2) To review recent literature by equine geneticists who research and/or discuss inbreeding trends and genetic diversity and the advantages and drawbacks of inbreeding.

3) To discuss how the specifics of the original Jockey Club mare limit proposal could be altered to better serve the industry.

The results of our …