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The variability of demographic trends at the subnational scale, particularly internal and international migration, renders subnational population forecasting more difficult than at the national scale. Illustrating the uncertainty of the demographic future for subnational regions is therefore a...
Persistent link: https://www.econbiz.de/10009448064
This thesis contributes to the research in highly skilled migration and takes special interest in questions and concerns of the European Union. The research will look at the causes of migration and what factors cause the selection of migrants. In particular, it will present three empirical...
Persistent link: https://www.econbiz.de/10009475332
Die vorliegende Arbeit untersucht wissenschaftlich anhand eines theoretischen Modells, wie sich internationale Migration auf die Volkwirtschaft des Aufnahmelandes auswirkt – nicht nur im Rahmen der EU-Osterweiterung. Kapitel eins enthält neben einer Hinführung zum Thema einen allgemeinen...
Persistent link: https://www.econbiz.de/10009450197
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
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
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
Carlo, Latin hypercube sampling with constrained Monte Carlo, and generalized likelihood uncertainty estimation), and …
Persistent link: https://www.econbiz.de/10009429563