201,779 research outputs found
Estimation of an indicator of the representativeness of survey response
No full textNonresponse is a major source of estimation error in sample surveys. The response rate is widely used to measure the quality of a sample survey associated with nonresponse. It is, however, inadequate as an indicator because of its limited relation with nonresponse bias. Schouten et al. (2009) proposed an alternative indicator, which they refer to as an indicator of representativeness or R-indicator. This indicator measures the variability of the probabilities of response for units in the population. This paper develops methods for the estimation of this R-indicator assuming that values of a set of auxiliary variables are observed for both respondents and nonrespondents. In particular, we consider the bias of point estimators proposed by Schouten et al. (2009) and propose bias adjustments and linearization variance estimators. The proposed procedures are evaluated in a simulation study and their use is illustrated in an application to two business surveys at Statistics Netherlands
Bibliotheca selectissima, sive, Catalogus librorum, plurimum rarissimorum in omnibus facultatibus scientiis ac linguis : in quibus excellunt, variae exquisitae collectiones ... = Een uitgezochte bibliotheeck van de allerrarste boecken : in allerhande faculteiten, wetenschappenen taalen, waar in uytmunten eenige ongemeene verzaamelingen ...
No full textConsignor: Isaäc le Long."Quae omnes magno studio, labore & impensis per 50 annos continuos comparatae, auctione publica vendentur Amstelaedami, die Lunae 17 Augusti & seqq. 1744 apud Salomonem Schouten, bibliopolam in platea vulgo dicta de Kalverstraat."Signatures: pi⁶(-pi2) A-L⁸ M² (A)-(Q)⁸ (R)⁶(-(R)6) a-b⁸ c⁴.Blogie,Date of sale: Aug. 17, 1744, and days following.Place of sale: Amsterdam.Mode of access: Internet.Library's copy has a few annotations; bound in old marbled paper over boards; leather back and corners; gilt spine; sprinkled edges. Binder's title: Bibliotheek van Jsaac le Long
Metaeuchromius inflatus Schouten 1997
No full textMetaeuchromius inflatus Schouten, 1997 (Fig. 3) Metaeuchromius inflatus Schouten, 1997: 119, figs. 9, 22, 28. Materials examined. CHINA: 2 3, Bubang, Mengla (21 ° 29´N, 101 ° 33´E), Yunnan Province, 650 m, 22.– 23.viii. 2005, leg. Yingdang Ren; 1 3, Wenquan (24 ° 59´N, 102 ° 27´E), Kunming, Yunnan Province, 1900 m, 29.viii. 2005, leg. Yingdang Ren; 7 3, Menglun Tropical Botanical Garden, Menglun (21 ° 55´N, 101 ° 13´E), Yunnan Province, 570 m, 15.viii. 2005, leg. Yingdang Ren; 48 3, 5 ♀♀, Ruili Rare Bontanical Garden, Ruili (24 °00´N, 97 ° 50´E), Yunnan Province, 1000 m, 5–8.viii. 2005, leg. Yingdang Ren. Description. Adult (Fig. 3): Wingspan 11.0–15.0 mm. Distribution. China (Yunnan), Nepal. Remarks. Schouten (1997) described this species in detail. This species is new to China.Published as part of Li, Weichun, Li, Houhun & Nuss, Matthias, 2009, Notes on the genus Metaeuchromius Bleszynski (Lepidoptera: Crambidae: Crambinae) from China, with description of two new species, pp. 55-63 in Zootaxa 2287 on page 61, DOI: 10.5281/zenodo.27528
M. J. C. Schouten, Leadership and Social Mobility in a Southeast Asian Society
No full textRobinne François. M. J. C. Schouten, Leadership and Social Mobility in a Southeast Asian Society. In: L'Homme, 1999, tome 39 n°152. Esclaves et « sauvages ». pp. 250-251
M. J. C. Schouten, Leadership and Social Mobility in a Southeast Asian Society
No full textRobinne François. M. J. C. Schouten, Leadership and Social Mobility in a Southeast Asian Society. In: L'Homme, 1999, tome 39 n°152. Esclaves et « sauvages ». pp. 250-251
Globalizing L-infinity automorphisms of the Schouten algebra of polyvector fields
No full textRecently, Willwacher showed that the Grothendieck-Teichmuller group GRT acts by L-infinity-automorphisms on the Schouten algebra of polyvector fields T_poly(R^d) on affine space R^d. In this article, we prove that a large class of L-infinity-automorphisms on the Schouten algebra, including Willwacher's, can be globalized. That is, given an L-infinity-automorphism of T_poly(R^d) and a general smooth manifold M with the choice of a torsion-free connection, we give an explicit construction of an L-infinity-automorphism of the Schouten algebra T_poly(M) on the manifold M, depending on the chosen connection. The method we use is the Fedosov trick.</p
Indicators for monitoring and improving representativeness of response
No full textThe increasing efforts and costs required to achieve survey response have led to a stronger focus on survey data collection monitoring by means of paradata and to the rise of adaptive and responsive survey designs. Indicators that support data collection monitoring, targeting and prioritizing in such designs are not yet available. Subgroup response rates come closest but do not account for subgroup size, are univariate and are not available at the variable level.We present and investigate indicators that support data collection monitoring and effective decisions in adaptive and responsive survey designs. As they are natural extensions of R-indicators, they are termed partial R-indicators. We make a distinction between unconditional and conditional partial R-indicators. Conditional partial R-indicators provide a multivariate assessment of the impact of register data and paradata variables on representativeness of response.We propose methods for estimating partial indicators and investigate their sampling properties in a simulation study.. The use of partial indicators for monitoring and targeting nonresponse is illustrated for both a a household and business survey. Guidelines for the use of the indicators are given.<br/
Exchange rates and the European business cycle: An application of a quasi-empirical two-country model.
No full textCisgenesis: an important sub-invention for traditional plant breeding companies
No full textModern plant breeding is highly dependent on new technologies to master future problems. More traits have to be combined, frequently originating from wild species. Traditional breeding is connected with linkage drag problems. The crop plant itself and its crossable species represent the traditional breeders gene pool. GM-breeding is a new way of improving existing varieties. Transgenes originate from non-crossable species and are representing a new gene pool. For release of GM-plants into the environment and onto the market in Europe Directive 2001/18/EC has been developed, primarily based on GM-technology and not on gene source. In society, opposition against GM crops is complicating the implementation of GM crops. In this paper, it is shown that not only transgenes, representing a new gene pool but also cisgenes and intragenes are available, representing the breeders gene pool. Cisgenes are natural genes and intragenes are composed of functional parts of natural genes from the crop plant itself or from crossable species. Cisgenesis is the combined use of only cisgenes with marker-free transformation, mimicking linkage drag free introgression breeding in one step. Therefore, cisgenesis is a new sub-invention in the traditional breeding field and indicates the need for reconsideration of GM Directives. Inventions are frequently containing not only hardware elements, but also software and orgware elements. For cisgenesis it is foreseen that the technical (hardware) and bioinformatic (software) elements will develop smoothly, but that implementation in society is highly dependent on acceptance and regulations (orgware). It could be made in a step by step approach by specific crop-gene derogations from the Directive, followed by adding cisgenesis to annex 1b of Directive 2001/18/EC for exemption. At present GM crops can only be introduced by large companies. An open innovation approach for cisgenesis by public private partnership including traditional SMEs has been discussed. Cisgenesis has been exemplified for resistance breeding of potato to Phytophthtora infestans
A tool for agri-environmental policy decisions. Using a spatial agent-based modelling approach
No full textThe objective of this document is to improve the analytical tools towards policy issues at the interface of agriculture and nature targets, which can be evaluated at a regional scale addressing spatial coherence. Special attention is paid to the agent-based model developed by M. Schouten, named SERA
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