What follows is an opinion from a United States Court of Appeals.
Your task is to identify the issue in the case, that is, the social and/or political context of the litigation in which more purely legal issues are argued. Put somewhat differently, this field identifies the nature of the conflict between the litigants. The focus here is on the subject matter of the controversy rather than its legal basis.
Your task is to determine the specific issue in the case within the broad category of "economic activity and regulation".

Opinion:
Jack N. GILBERT, Appellant, v. Harold L. ICKES, Secretary of the Interior, and Henry L. Stimson, Secretary of War, Appellees.
No. 7912.
United States Court of Appeals for the District of Columbia.
Decided Aug. 4, 1941.
Daniel J. Hanlon, of Washington, D. C., and Wilbur E. Dow, Jr., of New York City, of the Bar of New York, pro hac vice, by special leave of court, for appellant.
Nathan R. Margold, Sol., Leland O. Graham and David M. Hudson, Asst. Sol., Department of the Interior, W. Robert Koerner, of the Bar of Minnesota, pro hac vice, by special leave of court, and Vernon L. Wilkinson, Department of Justice, all of Washington, D. C., for appellees.
Before GRONER, C. J., and EDGER-TON and RUTLEDGE, Associate Justices.
RUTLEDGE, Associate Justice.
The appeal is from an order dismissing appellant’s suit upon allegations identical in all substantial and material respects with those made in the complaint in Dow v. Ickes and Stimson,-App.D.C.-, 123 F.2d 909, decided this day. The issues presented by the two cases are identical and the results must be the same. For the reasons which have been stated in the opinion which has been rendered in Dow v. Ickes and Stimson, the orders are affirmed.

Question: What is the specific issue in the case within the general category of "economic activity and regulation"?

Choices:
taxes, patents, copyright
torts
commercial disputes
bankruptcy, antitrust, securities
misc economic regulation and benefits
property disputes
other

Answer: 4