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排序方式: 共有638条查询结果,搜索用时 6 毫秒
631.
This article considers wage?–?labour activities by agricultural households in Nicaragua. It analyses the role of: (1) comparative advantage as determined by individual and household characteristics; and (2) agricultural conditions and market imperfections, in shaping wage?–?labour supply. An econometric specification is developed which allows for random household-specific effects. Results reveal that non-agricultural wage work is largely determined by comparative advantages, whereas agricultural wage work is used to deal with a number of agricultural conditions and market imperfections. 相似文献
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Elisabeth L. Øiestad Ph.D. Ritva Karinen M.Sc. Asbjørg S. Christophersen Ph.D. Vigdis Vindenes Ph.D. Liliana Bachs Ph.D. 《Journal of forensic sciences》2014,59(1):208-210
In drug‐facilitated sexual assault (DFSA) cases, drug residues may be detected in beverage remains found in cups or glasses known to have been used by the victims. In this small naturalistic study, the possibility of beverages being contaminated, either by drug concentrated oral fluid or by oral cavity contained tablets, was investigated. Analysis of residues from cups containing soft drinks was performed by immunoassay and ultra‐performance liquid chromatography‐mass spectrometry (UPLC‐MS/MS). Beverage with both added tablets and spiked oral fluid was investigated, as well as simulation of swallowing tablets. Only the residues from added tablets were positive with immunoassay, while drugs were detectable in all cups using more sensitive UPLC‐MS/MS. In conclusion, the possibility of detecting drug residues in beverages due to a contamination, from either drug concentrated oral fluid or oral cavity contained tablets at a time of consumption, should be kept in mind when performing sensitive analysis. 相似文献
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Søren Serritzlew Asbjørn Skjæveland Jens Blom-Hansen 《The Journal of Legislative Studies》2013,19(4):421-450
Government coalitions should be minimal winning. However, it is an empirical fact that oversized coalitions exist. Several theories have been offered to explain this phenomenon, but they are seldom put to a systematic empirical test. When empirical tests are performed, they are typically based on data on national government formations in post-war Europe. Since these are the data that gave rise to the theories in the first place, there is a risk of post hoc hypothesis reformulation. The purpose of this paper is to test explanations of oversized coalitions systematically in a new empirical setting and thus avoid this circularity problem. We focus on local governments in Denmark and have collected data by a survey sent to almost 3,000 local councillors. We draw hypotheses from three broad theoretical perspectives on oversized coalitions and test them in a logit regression analysis. The analysis shows that oversized coalitions cannot be explained by traditional coalition theories. Our results question the minimalist behavioural logic inherent in most coalition theories and suggest that parties may be motivated by norms. 相似文献
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Rebecca Pircher Stefan Pollak Annette Thierauf Markus Große Perdekamp Ulrike Schmidt 《Forensic science international》2013,224(1-3):33-36
Subcutaneous bruises caused by blunt injury are common findings in medicolegal case work. If the hematoma involves the anterior thoracic wall, bruises are mostly absent in the region of the nipples and the surrounding areola. A similar phenomenon has already been described for hypostatic skin hemorrhages. A possible explanation for both phenomena is the special tissue texture in the nipple–areola complex. Based on four cases from the forensic autopsy material and two cases from clinical forensic examinations, the macromorphological findings and the histological correlates are presented. 相似文献