goldschmidt simon; liepman frieda, hannover Portraits Couples

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Costumen, keuren, ende ordonnantien, van het baljuschap ende lande van Rijnland. Daar inne begrepen de algemene costumen ende regtsgebruyken, soo in de manier van procederen, als andere gemeene regtssaken, binnen de steden ende ten platten lande van Holland gebruykelijk. Verder gepast ende bevestigt met allen regten, regtsgeleerden, placcaten, ordonnantien, handvesten, keuren, gewoonten, ende gewijsden daar toe behorende.

"Lijste der welgeboren mannen, sedert den tijd dat Willem van Boshuysen baljuw van Rijnland was, die in den iare 1489. Baljuw wierd": p. 74-101.

Giftige werking van eenige plantenaftreksels op planten.

Thesis (doctoral)--Universiteit van Amsterdam.

Important omitted spatial variables in safety models: Understanding contributing crash causes at intersections

Advances in safety research—trying to improve the collective understanding of motor vehicle crash causation—rests upon the pursuit of numerous lines of inquiry. The research community has focused on analytical methods development (negative binomial specifications, simultaneous equations, etc.), on better experimental designs (before-after studies, comparison sites, etc.), on improving exposure measures, and on model specification improvements (additive terms, non-linear relations, etc.). One might think of different lines of inquiry in terms of ‘low lying fruit’—areas of inquiry that might provide significant improvements in understanding crash causation. It is the contention of this research that omitted variable bias caused by the exclusion of important variables is an important line of inquiry in safety research. In particular, spatially related variables are often difficult to collect and omitted from crash models—but offer significant ability to better understand contributing factors to crashes. This study—believed to represent a unique contribution to the safety literature—develops and examines the role of a sizeable set of spatial variables in intersection crash occurrence. In addition to commonly considered traffic and geometric variables, examined spatial factors include local influences of weather, sun glare, proximity to drinking establishments, and proximity to schools. The results indicate that inclusion of these factors results in significant improvement in model explanatory power, and the results also generally agree with expectation. The research illuminates the importance of spatial variables in safety research and also the negative consequences of their omissions.