نتایج جستجو برای: frisch
تعداد نتایج: 591 فیلتر نتایج به سال:
The details of the technique were given previously (Carson and Frisch, 1953) and consisted of the inoculation of standard amounts of influenza A virus (PR8 strain) into the allantoic cavity of 10 day old chick embryos. Thirty minutes later one to two mg of neutralized and filtered tannic acid were introduced and the fluids were harvested, tested for hemagglutination and for infectivity after st...
Recessions appear to be times when the marginal rate of substitution between goods and workers’ time falls below the marginal product of labor. If so, the allocation of workers’ time is inefficient. I develop a model of households and production that reconciles cyclical movements in the marginal value of time and the marginal product. The model embodies the findings of research that the Frisch ...
Iryna Bulyha,1 Carmen Schmidt,1 Peter Lenz,2 Vladimir Jakovljevic,1 Andrea Höne,3 Berenike Maier,3 Michael Hoppert4 and Lotte Søgaard-Andersen1* Department of Ecophysiology, Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch Str., 35043 Marburg, Germany. Department of Physics, Philipps-Universität, 35032 Marburg, Germany. Institute of General Zoology and Genetics, Westfälische W...
As part of a book symposium on Erwin Dekker's Jan Tinbergen (1903–1994) and the Rise Economic Expertise (2021), Mariana Mortágua Francisco Louçã reflect context Tinbergen’s evolution and, more specifically, his change(s) focus how to engineer social progress compared that closest colleagues, Ragnar Frisch.
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