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inventory of fine woody debris (FWD); however, the sampling protocols involve tallying only the number of FWD pieces by size … class that intersect a sampling transect with no measure of actual size. The line intersect estimator used with those …
Persistent link: https://www.econbiz.de/10009429473
Systematic sampling is easy, efficient, and widely used, though it is not generally recognized that a systematic sample … of them determine which estimators are unbiased, when using the sampling design as the basis for inference. We describe … selection. When the population size is known at the outset, systematic sampling with unrestricted selection is most likely the …
Persistent link: https://www.econbiz.de/10009429445
Binomial sampling based on the proportion of samples infested was investigated for estimating mean densities of citrus … parameters adequately described a validation data set from a sampling plan consisting of 192 samples. Projections indicated the … fitted parameters would apply to sampling plans with as few as 48 samples, but reducing sample size resulted in an increase …
Persistent link: https://www.econbiz.de/10009429479
. Projections indicated that a sampling plan consisting of 10 trees and eight flush shoots per tree would provide density estimates … presence-absence sampling plan with a fixed precision level was developed and can be used to provide a quick estimation of D …
Persistent link: https://www.econbiz.de/10009429531
both simple random and cluster sampling. The BRR estimate of variance is the sum of variances and covariances of unit …-level kNN estimates in the area of interest. In Monte Carlo simulations of simple random and cluster sampling from seven … and Monte Carlo sampling variances was good both for population and for small-area totals. The modified BRR estimator is …
Persistent link: https://www.econbiz.de/10009429532
In many applications of line intersect sampling, transects consist of multiple, connected segments in a prescribed … illustrated and a consistent sampling protocol, applicable to populations composed of arbitrarily shaped elements, is proposed. It …
Persistent link: https://www.econbiz.de/10009429541
We build up from the plant level an “aggregate(d)” Solow residual by estimating every U.S. manufacturing plant's contribution to the change in aggregate final demand between 1976 and 1996. Our framework uses the Petrin and Levinsohn (2010) definition of aggregate productivity growth, which...
Persistent link: https://www.econbiz.de/10009429432
Several spatial econometric approaches are available to model spatially correlated disturbances in count models, but there are at present no structurally consistent count models incorporating spatial lag autocorrelation. A two-step, limited information maximum likelihood estimator is proposed to...
Persistent link: https://www.econbiz.de/10009429435
In this paper, we explore empirically whether the USDA Forest Service's litigation success rate in each Forest Service region helps explain the persistent regional effects noted by Laband et al. (Laband, D.N., González-Cabán, A., and Hussain, A. (2006). “Factors That Influence...
Persistent link: https://www.econbiz.de/10009429454
Allocations of research funds across programs are often made for efficiency reasons. Social science research is shown to have small, lagged but significant effects on U.S. agricultural efficiency when public agricultural R&D and extension are simultaneously taken into account. Farm management...
Persistent link: https://www.econbiz.de/10009429551