188 July 1989
Western Journal of Agricultural Economics
Definite, Heteroskedasticity and Autocorrelation
Consistent Covariance Matrix.” Econometrica
55(1987):703-08.
President’s Commission on Americans Outdoors. Amer-
icans Outdoors: The Legacy, The Challenge. Wash-
ington DC: Island Press, 1987.
Shaw, D. “On-Site Samples’ Regression: Problems of Non-
Negative Integers, Truncation, and Endogenous Strat-
ification.” J. Econometrics 37(1988):211-24.
Smith, V. K., and Y. Kaoru. “Signals or Noise? Explain-
ing the Variation in Environmental Benefit Esti-
mates.” Draft, Dep. Econ., North Carolina State Uni-
versity, 1988.
Sorg, C. F., and J. B. Loomis. “Empirical Estimates of
Amenity Forest Values: A Comparative Review.”
General Tech. Rep. RM-107, Rocky Mountain Forest
and Range Experiment Station, Forest Service, U. S.
Department of Agriculture, Fort Collins CO, 1984.
U.S. Department of Commerce, Bureau of the Census.
Statistical Abstract of the United States, 1988. Wash-
ington DC, 1988.
U.S. Department of the Interior. “Natural Resource
Damage Assessments: Final Rule.” Federal Register
51(1986):27674-753.
U.S. Water Resources Council. “Economic and Environ-
mental Principles and Guidelines for Water and Re-
lated Land Resources Implementation Studies.”
Washington DC: Government Printing Office, 1983.
------. “Principles, Standards, and Procedures for Water
and Related Land Resource Planning.” Federal Reg-
ister 38(Sept. 10, 1973):174, Part III.
------. “Procedures for Evaluation of National Econom-
ic Development (NED) Benefits and Costs in Water
Resources Planning.” Federal Register 44(Dec. 14,
1979):72950-65.
Walsh, R. G. Recreation Economic Decisions: Comparing
Benefits and Costs. State College PA: Venture Pub-
lishing, Inc., 1986.
Walsh, R. G., D. M. Johnson, and J. R. McKean. “Re-
view of Outdoor Recreation Demand Studies with
Nonmarket Benefit Estimates, 1968-1988.” Tech.
Rep. No. 54, Colorado Water Resources Research
Institute, Colorado State University, 1988.
White, H. “A Heteroskedasticity-Consistent Covariance
Matrix Estimator and a Direct Test for Heteroske-
dasticity.” Econometrica 48(1980):817-38.